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Hi ,I'm new to this site and new to the topo and gps world,I'm very happy that I found this site. I have the New England NG topo program on my laptop. First question is can I install the topo maps to my Garmin Etrex 20,I know i can install waypoint to the gps from this program and have done so. I like the maps in this program better than the one I downloaded free from this site and thank you for that, and I did load it to my gps. Second question is when i loaded the program in the computer I can read level 1-3 without the disk being in the computer but not level 4 and 5. National Geographic told me some steps to take to install it and I followed them six time and still doesn't work. I did send them another email askinf for more help