I'm currently in the process of switching my computer OS's around..I just bought all my parts for my new computer and i was wondering if i can take the XP Professional i have on my old computer and put it on my new computer..im picking up xp home edition so i can give the computer to my sister..i think that i just have to take the new xp home edition and reformat the hard drive with it and have that activated with the new cd key so i can put the professional on my new computer..ty