Create PPD Download Exchange System/Website

Hello, We are looking to create a system where people can use Pay Per Download (PPD) sites like ShareCash, Uploadee, CPALead, LoudMo, etc. Basically the site will work as follows: 1. A user will signup on our site and have the ability to post files they want to promote within the system. 2. They can either post the file for free or upgrade that file to premium for a set $ value. 3. When posting the file they will need to have a file title, a link to the download file in the PPD system that they use. We will also need to have a way to randomly generate a code in a txt file or something that they can upload to the PPD system within the file that they want people to download. We will then use this code to verify that the person who downloaded the file, did in fact download it. [login to view URL] site will operate on a point based system. A point will be reward for various actions, such as downloading a file, or referring a friend. Users can then use these points to post more files without have to pay the premium fee, 5. There should be a simple referral system that will track new user referrals. This should compare against IP addresses that are alrerady registered among email addresses, etc to prevent duplicate accounts or people who will try to cheat the system. 6. A person should be able to pick the PPD site that they would like to download files from so that they only download files from sites of their preference. 6. When a person is downloading a file, the PPD page should pop open in a new page and not in an Iframe. It should also be done anonymously so there is no trace the to download exchange system. [login to view URL] should be able to skip files and comment on them as well. They should not be able to download the same file twice. 8. There should be a simple admin system where we can manage users, download links, payments, etc. Make it very simple. 9. Payment for premium files will go through PayPal. Let us know if you have any questions