Need an installer built

I use the Yahoo! Stores ecommerce platform. My desire is to be able to sell certain downloaded video (of which I own the copyrights for) to my customers. Yahoo Stores does not allow for a download of greater than 14 MB after the customer checkout. It was suggested to me that someone could write an "installer" program where the customer would download this installer to their computer and upon executing it, it would then go to my web server and download the file. I need the link that they're downloading from to be invisible or random so that the link cannot be shared. I'm also open to any other suggestions if this is not the right direction to go with this project. ## 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). * * *This broadcast message was sent to all bidders on Monday Oct 29, 2007 4:14:40 PM: One of the problems that have been brought to my attention is that by building this installer, the installer can easily be given to someone else to use. I think this is the wrong solution for me to take on this project. Unless you know of a better method or answer to this problem, I will likely just cancel this project. I apologize for the inconvenience. ## Platform I would like something that is windows and mac compatible, so if that is two different programs that is fine.