Really? I never heard of that NTSWITCH program. I made a day out of it, futzin' with all the various settings. Its really not that hard, you just have to start audio services, enable graphics acceleration, install Firefox because IE is locked down (which you could unlock, but I figured Firefox was easier to install). Anyway, I switched it over by hand, and it was actually quite fun and educational about Windows. Here's a website that can help you:
http://www.msfn.org/win2k3/
The only reason I gave up is because I didn't feel like reinstalling Photoshop, Microsoft Visual Studio, MS Office, Maya, all my cellphone drivers, my GBA devkit, etc, etc, etc. I have actual work to do too, ya know?

If I wasn't using this computer for legit work, I'd still be tinkering with 2k3. But right now its just a risk, and a risk for the purposes of playing games for a system I already own

But it was AMAZING to see Chankast in action.