Thanks for the great help so far, especially the http://www.gpsfiledepot.com/ link. I also downloaded Mapsource and have it working, but I am having a bit of problem.
I had a map I transferred from an etrex that had some california topo. I used mapsource to create a tennessee map using their SE topo. When I did this, it erased my California topo, and dropped in the SE tennessee.
I did a test, and it looks like I can drop in both SW and SE together.
Questions:
1. Can I save these maps in a custom file on a SD card or under custom maps on the unit, or will it always erase the map on the garmin?
2. If not, can I transfer them into a custom file (so I'm not losing what I've already created- or having to include them in a new build)?
3. My Garmen recognizes my custom maps (i've been making Satmpaps from google earth and gimp) all as one chunk or file, even though I have about 10 of them. Is there any way to put them in files that the garmen recognized them separately (so I can enable/disable them separately)?
Thanks!