ASP or ASP.NET Download script

I need a coder that can write a script to allow a download for 24 hours after a paypal payment has been made. I can use PayPal IPN if you need it. I need the URL Masked(if possible) I need this in ASP or ASP.NET My website is hosted on [[login to view URL]][1] They have a complete list of what works on their server on the home page ## Deliverables Complete and fully-functional working script in ASP or ASP.NET All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows 2003 Server