Need some help from a win/mac expert

[edX]

yes BVGP, that's what we're trying to tell you - that PS installs extra files in the library and system thru the installer that you need to run the app. just dragging and dropping in dropstuff is still not going to solve your problem. included in these are invisible files that verify the registration i believe. without them, you won't get it to work. if your dad can't burn a copy of the original disk, then the easiest thing to do would be have your dad send the original disk to you and then you send it back after installing it and burning your own backup.