Download Protector

I urgently need a script to protect the digital products sold from my website from being illegally downloaded by anybody other than paying customers. I also want the ability to create download links that expire within a specified period of time - whether it be 5 minutes, 1 hour, or any other amount of time as an added security measure even if someone managed to obtain a correct link. The 'Thank You' page ([login to view URL]) should display a customisable 'Thank You' message if accessed from a legitimate paying customer and show a customisable error message should it be directly accessed by someone who has not paid for the product. The script should have the abiity to setup multiple products each with its own different download location, 'thank you' and error page. It should also work with any online credit card payment processor, whether it be ClickBank, PayPal, RevEcom, etc. (I assume this would be done with Referrer Headers or something similar?) I need this urgently ... so no timewasters please ... ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform It needs to be a PHP/MySQL combination and able to run under a virtual server account on a Linux/UNIX box. I don't have root access, so please don't code anything that will require it. ## Deadline information I have set the bid expiry to 1 week from now, so if you are interested in working on this, don't waste any time. I have plenty more projects on the way, so if you can deliver the system on or before the deadline I will put loads more work your way.