My bro dual booted xp/vista, how do i boot up xp?

ok my bro set up a dual booth for xp and vista. now im on vista and if any of u are gamers i wana play crysis but i wana play it on xp (more stability) %26lt;--- thts excess info. now the thing is tht all i no is tht he presses something in the beginning which leads him to this blue screen where he changes some options and boots to xp, does anyone know what he mightve done? Like he changes 3-4 options in the blue bios screen, i know how to get there but dont know what to do.My bro dual booted xp/vista, how do i boot up xp?
F8 keyMy bro dual booted xp/vista, how do i boot up xp?
Ok yes. If the base is windows Vista, which I assume it is, pust F8 in the very beggining of windows. It will bring up options. Fiddle around with them until you find something that works.
He may have dual Partition one for XP and one for Vista

the answer would be to go in setup Screen and change which drive to boot first. C or what ever other partition you are using. Check out the my computer screen and see how many Hard Disk he has. That would be the where you will fine the other OS%26gt;