MP3 Download(repost)

Hi I run a small record company I want to allow user of the website to buy MP3's directly from us. Functions: Login and Membership Select MP3 to download select file size price options Pay and Download. I obviously do not want people who do not pay to be able to download MP3's so careful attention to security needed Once some-one had paid I would only want to allow them to download it 5 times. I would need a back end admin page for checking accounts, numbers of downloads per track and also for uploading and maintaining tracks to be downloaded We could discuss functionality in detail, but basically the above ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) 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 UNIX But on all browsers