I have now had my first iMac for a couple of weeks--love it--and getting to be somewhat knowledgable on its use (after 20 years on PCs). I am now ready to load Windows XP/ Bootcamp to use a couple of programs from work that can't run on Mac's. Is there anything I have to worry about or be concerned before I go ahead and load it and start using Windows? Or is it pretty seamless and works fine?