sorry for the german post :)
I tried to make this work with my Garmin Edge 705,but I cant get it to work :(
I renamed the file to gmapsup2.img (as I have another map already on the microSD) and put the file to the other map in the Garmin folder.
But the edge isnt recognizing the map :(
when I rename the file to gmapsupp.img and it is the only file within the Garmin folder,the Edge says "cant unlock maps".