F110-Automatic Selection of vendor bank by document currency

We are currently on version 5.0 and have a situation where one company code wants to eliminate the manual input of partner bank type-field BVTYP into the invoice document. The desired objective is to have the system automatically populate the field dependant on the currency in the document. The vendor master has several bank accounts within the same country, but with different bank accounts depending on the currency to be paid. The field has been populated with a representative country designation followed by the currency type. Payment grouping has been tried by creating a new type using the partner bank type. We are not using payment requests at the current time. Optimization has been briefly investigated.

Does anyone know or have exposure on how to get the payment proposal to show the same vendor with the two different bank accounts that are paid from different partner bank types? Since this pertains to just one company code we don't want to create a customized program.

Thank you for any suggestions.