I've looked at region 41 some time ago in the hex editor but it seems to be xored or encrypted with 3ac5 or something similar.
It also seems to be made up of a lot of data blocks (repeated) Some populated with Data, some not.
Once I even managed to find the unitid (xored) and it was repeated may times. (once per data block I recall)
I could never find the model number.
The file is dynamic and changes after reboot adding files etc etc.
I would appreciate more info on this file.