Wierd and tricky XP problem

[vee_ess]

The reason you have that problem is that when you installed Windows XP, it saw your 200GB drive as the boot drive, so it put the boot files on the boot sector of that drive. Now when you try to boot, there are no boot files on your 320GB drive, so it moves on to the next in the boot order, your 200GB drive, but when it tries to go to HDD1, it's going to the 200GB instead of the 320GB drive, which is no longer HDD1 but HDD0.