I need Windows XP for my school classes. I have an iMac. I want to buy a mybook and use it to expand my storage, which is full of video. I will have to partition. I have done this once or twice, but I never really understood what I was doing. The question is, do I put the XP on the mybook, or on my hard drive? and how should I partition everything? I am learning about these things in my classes, but I know just enough to be dangerous!!