Sliver X

Hello, I've used nLite for several years on my Windows 2000 installs, to much success. I was also the primary IT technician for a college which had an exclusive 2000 infrastructure. However, the home PC I've just put together uses a Core 2 Duo and other recent components, and 2000 just doesn't perform like it should. So I've bitten the bullet and purchased a copy of Windows XP Professional. So I have a question: What all was added to XP since 2000? I know of System Restore, UPnP, Themes, etc, but I'd like to rip out everything that *wasn't* in Windows 2000 so I can basically just benefit from the newer kernel XP provides. Any help would be greatly appreciated.