this is what i get while using PC10IMG.zip screenshots attached...
i have no clue why its not recognising the file from the sdcard, i even tried formatting the sdcard and only keeping PC10IMG.zip on it but still no use..
Well, you do seem to have the G2 hboot on your DZ, and if you have a DZ ROM then I'm not too suprised if weird things are happening.
You may be able to flash the hboot itself via fastboot.