I simply downloaded the gpx file from
http://www.topofusion.com/divide/gps.php , then opened the garmin from "My Computer", searched for the "New Files" folder, then saved the file into that folder. Disconnected the garmin and let it refresh the files. Came out fine on the other end. I do have an SD card installed with street maps if that makes a difference. The settings for how the map will function can be made when you set your course for the TD trail by clicking the "wrench icon" on the screen..Hope that helps..