Just saw this post, I would say just install XP without all that Raid stuff on that HDD you bought. Now the after you install XP ur gona need a program called EasyBCD 2.0.2 which you will use to dual boot with XP and Win7. Now i helped Marlin, Shafty and countless others to do that very simple. After using this EasyBCD you will have the option to boot from either 1 of the OS simple is that. Good luck Archer