BTW, looking at your post above, you did not specify exactly what GPS you have. There are probably about 10 different models in the "GPSMap" series. If yours is a very old device such as the GPSMap 60csx, then this kind of map is not compatible. But if it's a newer model such as a GPSMap 62, GPSMap 64, or GPSMap 66 then it will work.
Unfortunately, if you have one of these very old devices from the GPSMap 60 series, it will be much more complicated to make a map yourself.
