94462 Mod to PayPal Stock Script

I have a simple PHP script that allows me to run stock limited sales of products using PayPal. I need it modified so that it can be setup to either support sales via just Clickbank or both PayPal and Clickbank at the same time. I think know how this can be done, but I just don't have the technical knowledge. I'd also like the script to email me once all the items have been sold.