Newbie here... followed the directions precisely (or so I thought). Downloaded, unlocked, moved .img file to the Garmin dir of my GPS with all of my other .img files, but when I go to enable/disable the map it's not there on the list. All the other maps I have are there though. Any idea what I'm doing wrong?

Edit:
I have the 62s and left the file name as is: US_GarminLakes_Full.img. I also tried to rename it to GarminLakes, but that still didn't work