Payment medium by Payment Via and Bank

I have the following requesites in output payments:

- The Payment via is <N>, it is a certified payment which generates a file.

- The file is created by Payment Medium Workbench.

Now, Account department can pay those payments with a new bank, but this bank accept files with other file format...

How can I configure the system in order to use different payment medium format depends on the payment via and the house of bank, instead of use only the payment via?

Thanks in advance!