Since I posted last I used my original evox backup of the original (unmodded) box with the eeprom.bin. I then ftp'ed that eeprom to /tmp in the chimp26 installer and dropped to shell. I figured out that /initrd/bin/hdtool2 was what I wanted, so I did
/initrd/bin/hdtool2 -e /tmp/eeprom.bin -d /dev/hdb -o UNLOCK
(since doing UNLOCK first is how chimp's lockhdb script displays the password for you to approve). I got the same password as chimp's script displayed.
Then I followed your advice and took the xbox key and used that (using -k), also getting the same password.
At this point I think somethings going wrong with my xbox and the linux eeprom tools. Next I'll use config magic to get another eeprom backup and try using that.
Thanks.
Strange.. I thought evox could get 1.6's! Hmm.. When did you get this xbox? (me wonders)