The only one that's you'll be limited with is the video card, and mainly if your motherboard has AGP slots. Regarding services and other startup junk, while XP might not come with IIS potentially turned on, lots of applications install trash all on their own, not to mention the things that users add to their systems, either on purpose or by accident. For example, it's easy to do an app install and end up with browser toolbars.

J.Ja