Hi All. 

did Found a Way to enable it to Guest Licenses. but it will require for you Salesforce CRM Content setting to have Public Links. 
Basically is using this : https://developer.salesforce.com/docs/atlas.en-us.api.meta/api/sforce_api_objects_contentdistribution.htm
object, 

What I did is Create a Content Distribution for the Content Version and then after Creating it, you must get the ContentDownloadURL in the Image Source of the Site that you want and there you go. 

Please look at this simple Example: 

public Static String getImageURL(ID LatersPublishedVersionID){
ContentVersion cv = [SELECT ID , ContentDocumentID from ContentVersion where ID= :LatestPublishedVersionId];

List<ContentDistribution> cdList = [select ID,DistributionPublicUrl ,ContentDownloadURL  from ContentDistribution where ContentVersionId= :cv.Id and ContentDocumentId=:cv.ContentDocumentId ];
                    if(cdList.size()>0){
                      return cdList.get(0).ContentDownloadUrl;
                    }else{
                        ContentDistribution newItem = new ContentDistribution();
                        newItem.Name = cv.Title;
                        newItem.ContentVersionId = cv.Id;
                        newItem.PreferencesAllowViewInBrowser= true;
                        newItem.PreferencesLinkLatestVersion=true;
                        newItem.PreferencesNotifyOnVisit=false;
                        newItem.PreferencesPasswordRequired=false;
                        newItem.PreferencesAllowOriginalDownload= true;
                        Insert NewItem;
                        
                        newItem = [SELECT ID,DistributionPublicUrl, ContentDownloadURL  from  ContentDistribution               where ID= :newItem.Id];
                     
                        return newItem.ContentDownloadURL;
                    }

Hope this helps