/self-congratulatory back pat .... I got rep'ed for my first post YiPee!
The HD is located inside the headunit.
Be aware that the HD is password protected using the ATA password standard (same thing a setting a HD password in BIOS on a laptop.)
I had to learn that standard and then us a logic analyzer to capture my head-unit's power exchange with the HD to reverse crack the password.
You can see the contents of the HD and other information here(s):
http://www.nagtroc.org/forums/index....dpost&p=385111
http://www.nagtroc.org/forums/index....dpost&p=388865
http://www.nagtroc.org/forums/index....dpost&p=388992
http://www.nagtroc.org/forums/index....dpost&p=389863