heres the Multi_insert class as requested

public class multi_insert {
      
    public List<Task> tasks ;
    public List<caserefs> cases {get; set;}
    public String Subject;
    public String notes;
    public Boolean docReturns;
    public Boolean redticket {get; set;}
    public integer numitems {get; set;}
    public decimal totalcost {get; set;}
                     
    public List<SelectOption> gettypes() {
        List<SelectOption> options = new List<SelectOption>();
        options.add(new SelectOption('','--Select Record Type --'));
        options.add(new SelectOption('No contact letter','No contact letter'));
        options.add(new SelectOption('Rebook letter','Rebook letter'));
        options.add(new SelectOption('7 day letter','7 day letter'));
        options.add(new SelectOption('14 day letter','14 day letter'));
        options.add(new SelectOption('Documents Received','Documents Received'));
        options.add(new SelectOption('1st class letter','1st class letter'));
        options.add(new SelectOption('Registered letter','registered letter'));
        options.add(new SelectOption('2nd class letter','2nd class letter'));
        options.add(new SelectOption('Special Delivery','Special Delivery'));
        options.add(new SelectOption('Sent introduction letter','Sent Intro Letter'));
        options.add(new SelectOption('Sent 1st No contact letter','Sent 1st No contact letter'));
        options.add(new SelectOption('Sent 2nd No contact letter','Sent 2nd No contact letter'));
        options.add(new SelectOption('Report Sent','Report Sent'));
        options.add(new SelectOption('TLC Rejection','TLC Rejection'));
        options.add(new SelectOption('Property List','Property List'));
        return options;
        
    }
            
    public String getSubject() {
        return Subject;
    }
    
    public void setSubject(String Subject) {
        this.Subject= Subject;
    }
    
        public boolean getdocReturns() {
        return docReturns;
    }
    
    public void setdocReturns(Boolean docReturns) {
        this.docReturns= docReturns;
    }
        
    public multi_insert(){             
        tasks= new List<Task>();
        cases= new List<caserefs>();
        docReturns= false; 
        tasks.add(new Task());
        cases.add(new caserefs());
        cases.add(new caserefs());
        cases.add(new caserefs());
        cases.add(new caserefs());
        cases.add(new caserefs());
    }       

    public void addrow(){
        if(cases.size()<10)
             cases.add(new caserefs());    
    }     
    
    public void removerow(){  
        Integer i = cases.size();      
        cases.remove(i-1);    
    }        
    
    public void clearout(){
        //Nuke the cases
        cases.clear();
        cases.add(new caserefs());
        cases.add(new caserefs());
        cases.add(new caserefs());
        cases.add(new caserefs());
        cases.add(new caserefs());
    }

        public PageReference savepost(){
                //This function processes a list of post logging.
                Integer count = cases.size();
                //Create a list of opportunities to update.
                List<Opportunity>parole = new Opportunity[]{};
        Integer i = 0;  
        Integer k = -1;          
            do {
                List<Opportunity> holdingpen=[SELECT id, name, accountid from opportunity where Claim_Ref__c = :cases[i].caser limit 1];
                if(holdingpen.size()==1)
                {
                        Opportunity cell=holdingpen.get(0);
                        holdingpen.clear();
                        tasks.add(new Task());
                        k++;
                        tasks[k].whatID=cell.id;
                        cases[i].policyholder=cell.name;
                        tasks[k].Subject='Post received';
                        tasks[k].description='Received';
                        if(cases[i].docser==true) {
                                //Docs received is ticked
                                tasks[k].description=tasks[k].Description+' documents, ';
                        }
                        if(cases[i].keyser!=null) {
                                //Keys is filled in
                                tasks[k].description=tasks[k].Description+' '+cases[i].keyser+' keys,';
                        }
                        if(cases[i].itemser!=null) {
                                //An item is filled in
                                tasks[k].description=tasks[k].Description+' '+cases[i].itemser+',';
                                cell.Date_Documents_Received__c=date.today();
                                update cell;
                        }
                        //All cases
                        tasks[k].description=tasks[k].Description+' passed to '+cases[i].handler+'.';
                        tasks[k].ownerID=UserInfo.getuserid();
                        tasks[k].status='Completed';
                        tasks[k].activitydate=system.today();
                        ID relation=[Select id from Contact where accountid= :cell.accountid limit 1].id;
                        tasks[k].whoid=relation;
                 }
                else
                {
                        //we did not find it.
                        cases[i].policyholder='CLAIM NOT FOUND';
                }
                i++;
                } while (i < count);
                         
            insert tasks; 
            //Get rid of the tasks as they have IDs.                        
            tasks.clear() ;
            // nuke the whole darn thing
        PageReference home = new PageReference('/apex/PostLogging');        
        //home.setRedirect(true);        
        return home;
        }      
        
        //Household Email version
        public PageReference saveemail(){
                //This function processes a list of post logging.
                Integer count = cases.size();
                //Create a list of opportunities to update.
                List<Opportunity>parole = new Opportunity[]{};
        Integer i = 0;  
        Integer k = -1;          
            do {
                List<Opportunity> holdingpen=[SELECT id, name, accountid, ownerid from opportunity where Claim_Ref__c = :cases[i].caser limit 1];
                if(holdingpen.size()==1)
                {
                        Opportunity cell=holdingpen.get(0);
                        holdingpen.clear();
                        tasks.add(new Task());
                        k++;
                        tasks[k].whatID=cell.id;
                        cases[i].policyholder=cell.name;
                        tasks[k].Subject='Documents received by Email';
                        tasks[k].description='Received ' +cases[i].itemser + ', ' + 'saved to scanstore. Please acknowledge';
                        tasks[k].ownerID=cell.OwnerId;
                        tasks[k].status='Not Started';
                        tasks[k].activitydate=system.today();
                        ID relation=[Select id from Contact where accountid= :cell.accountid limit 1].id;
                        tasks[k].whoid=relation;
                        cell.Date_Documents_Received__c=date.today();
                        update cell;
                }
                else
                {
                        //we did not find it.
                        cases[i].policyholder='CLAIM NOT FOUND';
                }
                i++;
                } while (i < count);
                         
            insert tasks; 
            //Get rid of the tasks as they have IDs.                        
            tasks.clear() ;
            // nuke the whole darn thing
        PageReference home = new PageReference('/apex/HouseholdDocsReceived');        
        //home.setRedirect(true);        
        return home;
        }
        
    public PageReference save(){ 
        Integer count = cases.size();
        Integer i = 0;  
        Integer k = -1;          
            do {
                List<Opportunity> holdingpen=[SELECT id, name, accountid from opportunity where Claim_Ref__c = :cases[i].caser limit 1];
                if(holdingpen.size()==1)
                {
                        Opportunity cell=holdingpen.get(0);
                        holdingpen.clear();
                        tasks.add(new Task());
                        k++;
                        tasks[k].whatID=cell.id;
                        cases[i].policyholder=cell.name;
                        tasks[k].Subject=Subject;
                        if (Subject=='Documents Received')
                        {
                                tasks[k].description=Subject +' '+cases[i].poster;
                        }
                        else if (Subject=='TLC Rejection')
                        {	
                        		tasks[k].description='Claim has been rejected from TLC';
                        }
                        else if (Subject=='Property List')
                        {
                        		tasks[k].description='Property list has been sent to the insurer via email';
                        }
                        else
                        {
                                tasks[k].description='Correspondence sent: '+Subject +' '+cases[i].poster;
                        }
                        if (docReturns)
                        {
                                tasks[k].description='Documents returned.  '+tasks[k].description;
                        }
                        tasks[k].ownerID=UserInfo.getuserid();
                        tasks[k].status='Completed';
                        tasks[k].activitydate=system.today();
                        ID relation=[Select id from Contact where accountid= :cell.accountid limit 1].id;
                        tasks[k].whoid=relation;
                 }
                else
                {
                        //we did not find it.
                        cases[i].policyholder='CLAIM NOT FOUND';
                }
                i++;
                } while (i < count);
                         
            insert tasks; 
            //Get rid of the tasks as they have IDs.                        
            tasks.clear() ;
            // nuke the whole darn thing
            PageReference home = new PageReference('/apex/Letter_out');        
            //home.setRedirect(true);        
            return home;                    
            }  
            
    public PageReference cancel(){            
        PageReference home = new PageReference('/home/home.jsp');        
        home.setRedirect(true);        
        return home;    
    }    
    
    public PageReference outg() {
    	//This is for the page outgoing_Post
    	//Requires tasks and disbursements.
    	//Existing disbursements get loaded into this list.
    	List<Disbursement__c> costs = new List<Disbursement__c>();
    	//Disbursements that need updating get loaded into this list.
    	List<Disbursement__c> costupdates = new List<Disbursement__c>();
    	//New tasks get loaded into this list.
    	List<Task> jobs = new List<Task>();
    	//The list of case references, as a list so I can use it in a SOQL query to get the lot.
    	List<String> reflist=new List<String>();
    	//When handling each disbursement to be upserted, here is a holding item
    	Disbursement__c costitem;
    	//We need to know our record type for the disbursement
    	ID PostRecType=[SELECT id from RecordType where SObjectType='Disbursement__c' AND name='Postage' LIMIT 1].id;
    	//A boolean flag showing we found a disbursement.
    	boolean foundexisting = false;
    	//Need maps to cross-reference case refs to opportunity names for the UI
    	//Map to cross-ref accountID and case ref
    	Map<ID, String> accid2caseref = new Map<ID, String>();
    	//Need to map contactID and case ref
    	Map<String, ID> caseref2conid = new Map<String,ID>();
    	//And a map of policyholdername and case ref
    	Map<String, String> caseref2name = new Map<String,String>();
    	//And a map of opportunity ID and case ref
    	Map<String, ID> caseref2oppoid = new Map<String,ID>();
    	//Let's build the list of case refs to do the SOQL.
    	Integer count=cases.size();
    	for (caserefs itera : cases ) {
    		//Build list of case refs in the loop
    		reflist.add(itera.caser);
    	}
    	//Get the claims and disbursements.
    	List<Opportunity> pileof=[SELECT id, name, accountid, insurer_prefix__c, Claim_Ref__c, (Select id, RecordTypeId, Cost_to_ACM_variable__c, postage_type__c, Handelling_Fee__c, Cost_to_Client__c, Comments__c, Type__c From Disbursements__r) From Opportunity where claim_ref__c in :reflist];
    	//Let's decide how much this is going to be.
    	//Current costs are, 23/8/10
    	//First class letter 41p
    	//Second class letter 32p
    	decimal value=0;
    	//Set to two decimal places to make sure it look like a price.
    	value.setScale(2);
    	if (subject=='1st Class Post'){
    		//1st class
    		value=0.41;
    		if(redticket==true){
    		//Registered signed for is 74p
    		value=value+0.74;
    		}
    	} else if(subject=='2nd Class Post'){
    		//2nd class
    		value=0.32;
    		if(redticket==true){
    		//Registered signed for is 74p
    		value=value+0.74;
    		}
    	} else if(subject=='1st Class Packet'||subject=='2nd Class Packet'){
    		//Packet means looking at the supplied figures.
    		//Fallback figures are large letter lightest class.
    		if(numitems > 0 && totalcost > 0){
    			//IE they filled it in
    			value=totalcost/numitems;
    		} else {
    			//They failed.  Quite a feat as the field is required.
    			system.debug('Epic failure to provide cost/weight figures by '+ userinfo.getname());
    			value=-99;
    			//Set the value to £-99, so I can see it and Genny will query negative costs. 
    		}
    		// This section left out as RoyalMail.com OBA shows prices including registered fee
    		//if(redticket==true){
    		//Registered signed for is 74p extra on parcels
    		//value=value+0.74;
    		//}
    	//End of cost calc section.	
    	}
    	//Clear the maps ready to be refilled.
    	accid2caseref.clear();
    	caseref2name.clear();
    	caseref2oppoid.clear();
    	//Iterate rows of Opportunity
    	for (opportunity cell:pileof) {
    		//We have one opportunity with multiple disbursements.
    		//Populate the maps with ID and name information.
    		accid2caseref.put(cell.accountid, cell.claim_ref__c);
    		caseref2name.put(cell.claim_ref__c,cell.name);
    		caseref2oppoid.put(cell.claim_ref__c,cell.id);
    		//Clear old values out of disbursement table and foundexisting.
    		costs.clear();
    		foundexisting=false;
    		//Take the child query and copy into the list.
    		costs=cell.disbursements__r;
    		system.debug(cell.Claim_Ref__c);
    		system.debug(costs.size());
    		if (costs.size()>0) {
    			//Then there is a disbursement
    			//Loop through them until we find a postal one.
    			for(Disbursement__c existings : costs) {
    				if(existings.RecordTypeId==PostRecType&&existings.Postage_type__c=='Automated entries') {
    					//If we do find one, set the flag foundexisting.
    					foundexisting=true;
    					//Take the item for our list to be updated.
    					costitem=existings;
    				}
    				//Not postage, next iteration of for loop
    			}
    			//End of for loop, time to see what we found.
    		} 
    		if (foundexisting==false) {
    			//No existing disbursement found, insert here.
    			costitem=new disbursement__c(RecordTypeId=PostRecType, Postage_type__c='Automated Entries', Handelling_Fee__c=15, Disbursements__c=cell.id, Cost_to_ACM_variable__c=0, Comments__c='.', Status__c='Received');
    		}
    		//As it's boolean, not entering the if braces must mean we found one already and copied it into the costitem variable.
    		//Now we have an item to update,
    		//Increase the Cost to TCF by known amount
    		if(cell.Insurer_Prefix__c!='Royal and Sun Alliance') {
    			//RSA don't pay postage
    			costitem.Cost_to_ACM_variable__c=costitem.Cost_to_ACM_variable__c+value;
    		}
    		//Journal the item with today's date in the reason for disbursement
    		costitem.Comments__c=costitem.Comments__c+'\n Post disbursement of £'+string.valueOf(value)+' for';
    		if(redticket==true){
    			costitem.Comments__c=costitem.Comments__c+' Registered ';
    		}
    		costitem.Comments__c=costitem.Comments__c+' '+subject+' Added '+system.now()+' by '+userinfo.getName();
    		//Add our item to the stack of updates.
    		costupdates.add(costitem);
    		//Now create a logging task
    		
    		//Now update the list of items with the PH name to prove we did it
    		}
    		//End of loop of opportunities
    		//Stick our updated disbursements back into the database.
    		upsert costupdates;
    		//Now update UI variables to show, and create logging tasks.
    		//We need to query contacts using the accountid list to personalise the tasks.
    		Set<ID> accountlist = accid2caseref.keyset();
    		List<Contact> personnel = [Select ID, AccountID from Contact where AccountID in :accountlist];
    		//Now use our list to create and populate a map of caseref to contactid
    		//A holding var for contact ID and case reference and the task item to be pushed on to queue.
    		String caserf;
    		ID thiscon;
    		Task workitem=new Task();
    		//Clear the map of contact IDs to make sure there's no overlap
    		caseref2conid.clear();
    		for(Contact conlisting : personnel) {
    			//Goes through each contact found
    			caserf=accid2caseref.get(conlisting.accountID);
    			caseref2conid.put(caserf,conlisting.ID);
    		}
    		//Update loop
    		for (integer i=0; i<count; i++){
    			//Update each UI row in turn to add cost value
    			cases[i].keyser=string.valueof(value);
    			//Find the name value from the map and update UI value
    			cases[i].policyholder=caseref2name.get(cases[i].caser);
    			//Set up the task
    			workitem=new Task();
    			workitem.Status='Completed';
    			workitem.ActivityDate=system.today();
    			workitem.Subject=Subject;
    			workitem.ownerID=UserInfo.getuserid();
    			workitem.WhatId=caseref2oppoid.get(cases[i].caser);
				workitem.whoid=caseref2conid.get(cases[i].caser);
				workitem.description='Correspondence sent: '+Subject +' '+cases[i].poster;
				if (docReturns)
                        {
                                workitem.description='Documents returned.  '+workitem.description;
                        }
    			

                if(cases[i].policyholder==null) {
    				//The claim is not found, so there's no name in the pile.
    				cases[i].policyholder='CLAIM NOT FOUND';
    			}  else {
    				//The claim was found, so values are safe
    				system.debug(workitem);
    				jobs.add(workitem);
    			}
                       
    		}
    		//Now our pile is created let's insert it
                insert jobs; 
    		//finally, let's create the page reference to return, which udpates the page.
    	PageReference home = new PageReference('/apex/Outgoing_Post');        
        return home;
    }
}

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