Help! Hard drive formats MAC and PC?

hi greffey, mac and pc formats the same so what i recommend is to go to control panel for windows vista or windows 7 beta go to programs and features and uninstall your virus protection then go to backup and restore and restore your system twice and place windows xp into your dvd drive and reboot when you see your windows logo start taping f12 boot from usb cdrom or just cdrom and start taping any key until the scan begins then stop taping and let the scan finish. now hit install when you get to petitions then hit D ENTER and L then hit next and do the long format and then set back and enjoy the show. when it is completely installed then place the windows that you want to use in your dvd driver like we did windows and start it just like we did windows xp. install your product key is on the box that your windows came in and when you come to your petitions then highlight the petition hit advance and delete it the second time and hit next to install your windows. good luck hope i was helpful to you