Quick Books Data Import using IIF files / Mapping required

Hi, we are currently setting up to use Qbooks 2010 with our business. We do not create new accounts by manually entering in the data one by one via QBooks but rather import an Excel file which automatically converts to an .IIF format recognized by QBooks. When we initiate the import process to create new accounts from within QB, a template pops up in Excel and we simply copy and paste the data into the appropriate cells then click add data and QB does the rest. Accounts are successfully created. If I need to modify the contents of an account (general contact info) I simply use that same process & template making sure that the Company name is in the company name filed because it appears that QB searches for this field to make mods to an account. I tried using the contact name leaving the company name out to see what would happen and a new account was created. That said the IIF files searches for the company name then makes changes to the contents of that specific file. My challenge: I need to create an IIF file that can be used to import transaction data into my customers files from reports that we export to Excel from our credit card processing partner. This would include general transaction such as payments from customers, Credit card refunds to customers etc. Reference:[login to view URL] I’m told from QB support that this would require special mapping using the available fields within QB since we do not receive the customers company name from our processing partner. Therefore we would have to map this to the contact name on file in order to update the transactions. If you have experience in this field and are familiar with my requirements, kindly let me know ASAP. We have samples of data from our credit card processing partners as well will give full access to whatever may be required to assist you.