It is an IMG: rename it to gmapsupp.img
unlock using jetmouse keygen v1.5
[Only registered and activated users can see links. ]

to get the sd card serial number-from 4 to 10 digits
push the battery indicator for 30 seconds>next>next>on top is the sd cards size and next is the serial number you put on the top of keygen v1.5
--if your gps doesn't give you a sd serial number---you can use the gps unit id number
create a file you must name gmapsupp.unl with notepad
(no txt ext, save it as all files)
and put it with the map into the garmin directory of your sd card.