Affiliate Prgram Script Modification

We're looking for a custom affiliate program script for our ad network. Besides standard referral program features, we need the script to: 1. Automatically generate payment files ie. files that tell us who needs to be paid, the method, how much, and their PayPal email address or check address or whatever. Optional: If it can generate a PayPal mass payments file, that'll improve your bid. 2. Have the interface be aesthetically pleasing 3. The payout system will be complicated. Let's explain. We operate an ad network and pay publishers. We want our script to login to our admin control panel that has been already created by us, get the payment amounts for each publisher, calculate 5% of that, and add those amounts to the balance of the affiliate who referred the publisher. It should do this every day. This requires that the script know who referred each publisher. We can provide the source code of some existing affiliate scripts so that you can modify them, to make the work a lot easier. The hard part is retrieving and placing earnings data. It's up to you what you use, but you'll probably want to know PHP. And you'll probably want to know how to work with web forms. Our budget is up to $1,000. This is negotiable. If you bid higher, we will expect more features.? Features are preferred slightly over cost.