Change SRM vendor search help

Hi,

I have a requirement to change the standard vendor search help on SRM.

I have created a new SH on R/3, this SH has a SH exit which calls the standard SAP SH exit BBP_F4IF_SHLP_EXIT_VENDOR_EXP, we have added some additional fields to the hit list table.

The SH works correctly in R/3, all I need to do is plumb it into SRM. I see that the service that's called, is BBPSC02, which has a source of BBPSC01.

This is where I get stuck ......

Any help will be appreciated

Regards

J-J