We are creating business partners through a custom RFM. But, there are BAPI's that you should be able to use to create/change/delete business partners. The screenshot below shows some of the BAPI options I am showing in our system. I am not sure if your system has the same, but I would guess there is an option.

------------------------------
Vanessa Kutasi | Application Analyst II
IDEXX | New England WUG Leader
------------------------------