[S.SubZero]

I got the same "not supported" error in Boot Camp on Win7 x64, but eventually it ran. I believe the Autorun will error out, but if you run the Boot Camp x64 installer manually it should run. I can't remember exactly what I did to get it going but it wasn't anything special.

The Boot Camp drivers for the most part pre-date Windows 7, so even after Boot Camp "installed" things it didn't actually install much. It does the keyboard media keys and the sorta-functional trackpad driver. Everything else was drivers I got from the makers of the individual components like nVidia and Realtek.