Another amendment to what I have said earlier, it looks like the issue runs deeper than just XBOXHDM. I am using an 80 gigabyte hard drive now that I have no more unlocked and working 40 gigabyte hard drives to throw at this. I am using the DOS tools provided on the same to lock and unlock my drives. It's odd, really. I can lock and unlock the Xbox hard drive with ease, no problem at all. However, locking and unlocking the new hard drive doesn't work with this Xbox in question. You know what is stupid? I CAN get it to work on other Xbox consoles. What. The. Hell.? What could be wrong with THIS specific console that merits it not to work on any other hard drive? Perhaps another type of lock somewhere? Some kind of HD Serial lock? Or some other hidden code? Just to be sure, when the Xbox spits error code 06, does that mean it can't unlock the drive, or is it something else? I just don't get it. I want to douse this Xbox with gasoline (and trust me, if it were mine, I would have done so by now) but that won't solve the immediate issue...