hi, this is so fustrating. i want to downgrade back to windows xp from windows vista. I have two harddrives. one is a 320gb sataII and the other is 120gb ata. When i try to install xp on the 320gb hd it keeps saying: "to install windows xp on the partition you selected, setup must write some startup files to the follow dick:" the disk it is refering to is the 120gb harddrive. So i follow the instructions and when the os is installed, i can never get into windows if i don't have the windows xp cd in the cd rom drive. it says "disk boot failure, instert system disk and press enter" or sometimes "missing ntrl" and also, my c: drive is always assigned to the harddrive where all the windows files are not locatied. in this case it is the 120gb one. please help. thanks.