Ah that could be something.
Virtual PC as far as I know is an emulator to run things. Rather like ones you can get to make your computer think it is a console, or an Amiga for example.
Maybe with the Virtual PC if you ran the program through that (emulating Windows maybe on the Windows machine, i don't know, it only what I read) you could minimize the emulator and not the program...
Heard it can be useful for example to run Win 98 games on XP