Windows 2000: don't do that.
- Windows 2000 support is going away soon (for example MSVC 2010 compiled exes won't run on W2K anymore unless you add some compatibility hack dlls..)
- Picasso96 emulation is slower in W2K (due to missing features)
- W2K has longest boot time ever
- Crappy sleep support (if you want really fast "booting", this finally works perfectly in 7 as long as drivers don't suck)
btw, if you want some related WinUAE updates (for "invisible emulation"), I'll listen if you explain why it is good idea, as usual