api scripting

Hi, I purchased s2member pro hoping i would be able to do some basic enrollments for our affiliate program. This is what i need to accomplish: Several things happen when someone joins our Direct Marketing Program First they have to pay an enrollment fee then they have to be enrolled as an affiliate with Post Affiliate Pro I know there is a way to have the API tell Post Affiliate Pro that the affiliate has paid and to automatically enroll them into the affiliate program. I mean every major company has that function. Amway takes you through multiple pages including collecting a payment then enrolls you automatically in the affiliate program, so do many many others In the meantime I need help getting this done. Im willing to pay someone that knows how to do this. We will have 3 options for the affiliate to choose from lets say "silver" Gold" "platinum" for sake of conversation. So the affiliate chooses what program he/she wants to join then is taken to paypal for credit card payment, once the payment is complete a script writes back to post affiliate pro and approves them for the affiliate program. Then sends the affiliate an email with login instructions both for s2members (not sure why i need that) and for the affiliate control panel. Please take a look at [login to view URL] prior to responding. No point in jumping up claiming to be an expert only to waste eachothers time.