Tired of windows XP built in themes?

http://www.istartedsomething.com/20061029/royale-noir/#downloadlink

This is actually something Microsoft created and embedded into windows XP Media Center edition. However it is part of windows XP as well. Just put it there and it works. As it is officially built and signed by Microsoft you don't need to tweak your system. (which is how this stuff should work anyhow.)