Ok the Montana 680 I have is not showing in the map I moved to the Garmin folder of the GPS. I downloaded the map and unzipped it and saved to my computer. It is now an .img file. I moved it from the computer to the Garmin folder in the GPS. There are other .img files where I put this one. I go to the maps screen and there is nothing in there that says CA-Central. The instructions on the map down load screen says I should just be able to move the windows version of the .img file to my GPS. I must be missing something. Thanks