Automated clip-art purchase manager

I want to be able to sell clip-art pieces individually - have the user choose which pieces he/she wants and then charge the appropriate amount for the total. This means packaging up the selected clipart into a Windows install package, or an archive file like SIT for Mac. Calculating the correct amount to charge. There are a lot of problems I do not know how to solve and I would be interested in hearing your opinions in the bid. Here are some limitations: * I already have a shopping cart that handles product downloads, but it cannot handle a dynamic product. I would prefer to use my existing shopping cart, however, if possible (ShopSite.) Perhaps a generic product for X cliparts and having the actual file overwritten every time - which is kludgy. * My shopping cart web server is Apache on Unix and cgi-bin programs can be added. * The front end must show thumbnails of the clip-art that is watermarked so people don't just take the thumbnails. * The solution must be able to easily accomodate adding additional clip-art for sale. ## 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) Exclusive and complete copyrights to all work purchased. (No GPL, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site). ## Platform Web server platform is Apache/Unix but Win server solutions would be entertained. The generated package(s) do be downloaded by the customer must be either self-extracting archives or well-known archive formats for Windows and Mac platforms, possibly with a freeware graphics viewer application, copyright and documentation files.