Payment advice form for customers and vendors in FBZP

Hi

Can anyone explain the payment advice form generation in F110 for customers and vendors both?

Since Payment methods in company code has only one Form, how can we assign two different forms for Customers and vendors? There are forms at "payment methods at company code level" as well. But what is the relation between Company code form and payment method level form?

Our requirement is " Generate payment advice for Vendors and customers seperately by its payment method". But everytime i test payment advice form, it seems program from Payment method at country is always pulling the form from Paying company code itself and not sure what is the use of payment advice forms assigned at payment method level

Note: We are using vendors outgoing payment methods for F110 and using customer incoming payment method (auto incoming methods like direct debit) for F110.

Any help please?

Thanks

Aleem