So you need support for a game on vista correct? Unless you happen to be running parallels or vpc, which would probably be a bad idea, I suggest you go to a forum where people might actually have an idea about how to help you.
Clickly. Seriously, just because it's on mac hardware doesn't mean any mac knowledge will help. If you're installing it, yet nothing happens then it's probably a windows issue. Ask people who bother with that sort of thing. And just to check, you did actually look for it in the C:\ drive right? Under microsoft games or wherever it should install to by default.