Electronic bank statement: clearing multiple invoices with one payment?

Hi,

I need to clear multiple invoices with one payment (in electronic bank statement line item). I am using the report RFEBKA00 and the user exit FB00001 to find the clearing informations.

Information: total of the amount of the invoices is equal to the amount of the payment. The references of invoices (ie 1234xxx) are all begining with the prefix of the payment reference (1234). They were the same but have been added a suffix each because in sap they couldnt all be entered with the same reference number.

Please suggest solutions to fix this problem.

Thanks