Automatic setup file replacement procedure

Problem description: We created a setup procedure for a Windows application. This will be downloadable from Internet.? One component has to be changed dynamically depending on? the calling parameter.? ? One file has to be different in the setup package on every callers ID. Example calling with parameter <websitename>/download/?ID=345 should point to a setup containing the file [login to view URL] with? <websitename>/download/?ID=999 will allow download of a setup containing file special999.dat. Possible solutions: All setups prepared on webserver but generated with an automated script that "exchanges" the (compressed) file automatically by calling? another script. (must run on standard providers? linux Server)? ? Setup reconfigured on calling site Other ideas? We have to assure that if the download is called with a parameter the right setup procedure is provided. In addition we automatically generate the files [login to view URL] with another process using a php script. Can you help?