@technomancy a lot of old windows demos rely on really particular assets being around (which wine doesn't/can't distribute), but often you can just copy all of the installation files from XP and get those demos to work.
they often aren't dependent on super esoteric behavior or exact implementations of libraries, just like, "the bitmap of the gradient built into the control panel" and stuff like that. my favorite keygens have tended to work pretty well in wine!