Uhm, never mind, actually running the hash through john the ripper gave me my password after 7 minutes (Single core at 2.4Ghz).
So to get your password back, don't risk editing the mtd1 directly, just do this:
Code:
echo root:$(grep -A 13 lock_code /dev/mtd1|tail -1):
then put this in a file and crack it with any DES cracker... wait and enjoy :-)
As a side note (reference), this works with 1.2009.42-11.002 ... we'll see how it changes with time.