I entered the 53DTQ-RNJYC-GPJHV-A7Y4C-68CP4 unlock key into the sendmap20 interface (removed the dashes) and created a single gmapsupp.img file from the many img files in the RoadNavi v2.10 (locked) folder. I then created the gmapsupp.unl file in notepad. I used the Jetmouse keygen with my device ID and the FID and PID numbers for that. I put both files into a Garmin folder on a microSD card. I put the SD card into the Garmin 1370t, turned the device on, and nothing. In Maps, under Info, I only see the preinstalled Europe, US and Canada maps. Can somebody advise what I need to do for my device to see the Japan maps?
(I will now try the unlocked versions from Easy Share). Should I just unrar them and put them on an SD card into a Garmin folder? Do I also need to put in the gmapsupp.unl file specifically created for my device using the keygen?
Alright, looks like I finally got it. The first link to the unlocked versions (part 1) gave a 440 mb img file which works from the SD card on Garmin 1370t.