MHDD - I made a typo.
HDD tools will unlock it BUT if you do not DISABLE the lock it will relock again when you shove it into the machine.
http://hddguru.com/software/2005.10.02-MHDD/
this disables the lock.
not sure of your background but you will need to memory map that thing. the USDM item is different UNLESS you get a later one then the video side of it will more than likely be in the same (or similar) spot.
the rest is up to you