Sure, you can dual boot Windows XP Pro and Windows XP Pro if you so desire. As long as you have the patitions, you can have whatever OS you want. Ultimate Boot CD (http://www.ultimatebootcd.com/) has some good free partition tools.
Installed it, works fine. except Media Center doesnt recognize my TV card even though i have PixelviewBt878 card installed with drivers. iam wondering if this is campatible.