separate line item for cash discount

Dear Guru

Our requirement is while doing clearing through transaction code F-32 against outstanding invoice amount with amount received , system are passing the eligible cash discount amount and system are clubs this cash discount amount with customer line item, our requirement is while doing clearing system create new line item for cash discount in customer a/c instead of club in the invoice line item.

Please suggest how we can create the separate line item for cash discount in customer a/c

Regards

Vijay