387722 Simple PHP Affiliate Script

I have a single web page with 1 product which sells at a fixed price. The cart is operated through Foxycart, using Authorize.net. I need a simple php/mySQL affiliate script which will integrate with Foxycart (taking the data when a sale is generated), and which will do the following AUTOMATICALLY (<= important): 1. Register every purchaser as an affiliate (if they aren't one already); 2. Send a configurable email offering them the opportunity to earn a commission by referring the product to their colleagues, friends and family; 3. Track sales, compute commissions, produce payment report; 4. Allow for tiered commissions; 5. Send commission report emails to affiliates. There is no need for a complicated affiliate center with access to banner ads, marketing materials etc - just the generation of a tracking code than can be used in emails. The url for the existing sales page is in the attached file project-url.pdf. Good luck!