Originally Posted by Taoshum
Sorry, my question about software was about the software to make the transfer from gpx to img? I use Mapsource for planning as well but then need something make the img file.
I think you misunderstood him. The way I read it was that BigDog used one of the suggested programs in here (either the GPXtoImage or IMGfromGPX) to create a new map image overlay of all his tracks of Baja and then probably using MapSource loaded that map img onto his GPS which is just an overlay map that shows all the tracks. He didn't specify which one he tried, but I would imagine it was one of them suggested in here.
I had remembered reading about this awhile back about people making "layers" as map images with tracks to load on their GPS, but this program or one of them listed in here seems like it does the trick. I haven't played around with it yet, but am planning on it.