Has Anyone tried this: xplite
Jep, it's pretty good, lots of things it lets you uninstall/reinstall the easy way (Outlook Express, Media Player (IIRC there are 3 MP on XP, the "original", version 7 and you can install version 9)..
Also let's you deactivate Windows File protection and other windows hard to get rid of preinstalled stuff..
It's pretty expensive for something you use only a few times..