LOL, these days Macs are no different than Windows PCs, because that's exactly what the Mac has become-- Apple switched over to using Intel CPUs earlier this year, and now all the new Macs run Windows XP natively, without emulation, because of it.
If you own one of the new Intel-based Macs, all you need to do is install the Boot Camp utility (available at Apple's website) and then install a copy of Windows XP. Once that's done, at bootup you can select whether you want to run OSX or XP.