Questions Need to Add the Company Name field from Vendor Record (Main Contact) as a column when user clicks list to select vendor for Bills & Adjustment Entry.

Need to Add the Company Name field from Vendor Record (Main Contact) as a column when user clicks list to select vendor for Bills & Adjustment Entry.  When adding a new AP Bill in Payables need the ability to sort by the Company Name not the Vendor Name when clicking in the vendor field.  Because of the 1099 vendor name populating the Vendor Name field the users cant sort on the common name which is stored on the vendor record on the Main Contact area, store as fullname on the contact record.  I tried doing customization and adding it to the selector area but dont know how to get to the contact record.  Anyone else have any experience in this?