So my friend mistakenly bought Parallels and a copy of XP so she could run Sims 2, except when trying to run it, Sims 2 doesn't work, supposedly because Parallels doesn't support it and its 3D graphics, but that is a different story. So I suggested that she install the copy of XP through Bootcamp, however she already has it installed through Parallels, and I am pretty sure that if you try to install XP on Bootcamp again it will ask for another validation code. So I am wondering if there is a way to install XP through Bootcamp on her Macbook while she already has XP installed through Parallels. As I'm not very experienced with Windows on a Mac I'm not sure how to do this. I'm know you can use an XP license in Parallels after it's already been installed in Bootcamp but I don't know about the other way around. Any help would be great. Thanks!