What I am wanting to do is add more functions to OsCommerce. I want to add a purchasing system to the admin section. It will take the names from the supplier fields, supplier cost and supplier partnumber. It will also need to self generate a PO number. Then I need a way to recieve it by PO number and only items that were on the packing slip. Then this updates my avaliable stock. If you have any other questions then let me know.
I have scratched the OS commersce and went to zencart which is better at the moment. It still uses the OScommerce db structure so I don't think that it will be much of a problem