Thread: GPSdaemon:extract the files contained in the GMAPSUPP.img file

I want to change these values.

Lets say that the original map is the one below.
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I split the map with gmaptool.
Lets say that I want to change "product name" to "13" and "area" to "14" in the first map on the mapset. What program should I use ?
After that, if I join the mapset with gmaptool, and when load it in GPSdaemon I should see the changed "product name" and "area" values (see below)
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