I bought a softmodded Xbox and was playing about with the EvoX dashboard and other programs that came with the mod. Now I've accidentally unlocked my hard disk (I didn't understand what I was doing at the time) and when I turn the xbox on now all I get is Service Error 05. From internet searches I've learned that this is caused because the retail bios requires a locked hard disk for the xbox to work. Is there anyway for me to lock the hard disk again or to install a spare hard disk I have lying around to get the box working again? Your help would be much appreciated.