Payment Wizard/Engine - creation of Bank File

Hi everyone

I am working on a UK implementation. We would like to produce a bank file using the Payment Wizard (outgoing bank transfer). The UK bank file formats provided with SAP are not the correct format - The clients would like to produce a BACS Standard 18 format for the bank file.

Has anybody created one of these file? How did you start? A pointer in the right direction would be appreciated. I think I can create new ones using Format Definition?

Thanks!