I just got my Mac Pro! Haha... I'm really happy. I'm currently installing all the programs I need on the XP64bit version I installed. I was wondering, can I just take out the harddrive(Windows xp installed) from my PC and stick it in MacPro without formatting it? I just want to keep all the data files that are in that harddrive so I don't have to transfer all those files into the macpro one. If I do put the harddrive in, will it try to start up from my PC harddrive windows xp? Or will it just ignore it and notice it as slave?