The standard publisher actions don't allow us to change the owner of a record. Does anyone have code to do that?

Since Assets don't allow for history tracking on fields, I am trying to create a long text field that tracks the values of these fields.  I have it pretty much worked out except for the picklist fields.  

Here is my Workflow Rule:
OR(
ISCHANGED( AccountId ),
ISCHANGED( ContactId),
ISCHANGED( SerialNumber ),
ISCHANGED( Serial_Number_2__c ),
ISCHANGED( Hardware_Status__c ),
ISCHANGED( Hardware_Model_iSC1__c),
ISCHANGED( Hardware_Model_iSC2__c )
)

Here is my Field Update:
"Asset changed from " +
PRIORVALUE(AccountId) +  "to " + AccountId + BR() +
PRIORVALUE( ContactId ) + "to " + ContactId + BR() +
PRIORVALUE( SerialNumber )+  "to " + SerialNumber + BR() +
PRIORVALUE( Serial_Number_2__c )+  "to " + Serial_Number_2__c + BR() +
PRIORVALUE( Hardware_Status__c ) + "to " + TEXT(Hardware_Status__c) + BR() +
PRIORVALUE( Hardware_Model_iSC1__c ) +  "to " +  TEXT(Hardware_Model_iSC1__c) + BR() +
PRIORVALUE( Hardware_Model_iSC2__c ) +  "to " +  TEXT(Hardware_Model_iSC2__c) + BR() + "by " + 
LastModifiedById +  BR() +
PRIORVALUE(Asset_History_Log__c)

The problem lies in the values the picklists are returning are not the actual PRIORVALUE, it is returning the picklist number(see bold below).
11to In Storage - New
1to ISC250-01P1227A
1to ISC250-01T2394A

Thoughts on how I can get the actual value to return?  Thanks,

We want to restrict all but one user from changing the stage of an opportunity to Closed/Won.  Here is my formula below.  Any suggestions?

AND(
$User.Id="00540000002WHSSAA4",
ISCHANGED(StageName),
ISPICKVAL(StageName,"80 - Closed/Won"))

I'm trying to create a trigger that populates this field if it is left blank.  It should populate with the Case Owner as a default.

We want to restrict all but one user from changing the stage of an opportunity to Closed/Won.  Here is my formula below.  Any suggestions?

AND(
$User.Id="00540000002WHSSAA4",
ISCHANGED(StageName),
ISPICKVAL(StageName,"80 - Closed/Won"))