Vendor line item - Mass changes for payment method supplement

Hi Experts,

i am not sure which is the appropriate forum to post this question. MM or FI or ABAP.

i have a requirement to make mass changes for vendor line items (tcode: FBL1N) payment method supplement.

The transaction screen has an option for other fields but not payment method supplement. i also found a note which suggests a solution that requires modify standard code to implement the mass change for payment method supplement.

Please let me know if anyone has any information on this.

regards,

Tashi