Tweak XP For Gaming & Performance
Here is a forum post LINK that shows how to:
Increase system performance
Disable XP’s -crud- built in CD Burner
Tune Systems Memory
Tweak The Swap File
Disable Services
Speed Up The File System
Disable DLL Caching
Tweak The Prefetch
SpeedUp Your Connection By 20% (Cable Users Only)
and more….
I tried some of these myself, and cause this is on your own risk, it`s good to remember what have you changed and which services you disabled, so you can enable them back when you see that something is not working.

There is even more tweaks for Xp performance
Comment by Realest — November 1, 2006 @ 10:42 am