http://moagu.com/?page_id=155

(I think you’ll need OCAD professional to export GeoTIFF or jpg with world files)

http://freegeographytools.com/2009/raster-maps-on-a-tomtom-gps

BTW
I found that I could not use custom maps on versions of Mapsource that were higher than 6.13.7. This was some time ago, so the very latest version of Mapsource may work with custom maps.

The process automatically edits your registry, you may like to take a backup of it and/or set a system restore point before continuing.

Add a directory to your C:\ drive to hold the mapsource files. For example C:\WG

Put MapsetToolkit.exe on your C:\

Double click on MapsetToolkit.exe on your C:\

Click on Select IMG files and select the folder where your IMG file is. That will populate the Source IMG files space.

Click on the img file you want in MapSource and then click on Add.

Fill in the directory where the program will assemble the bits and pieces it needs for Mapsource (in this example C:\WG\

Fill in Mapset name with the name you want to see in
Mapsource.

Put in a famlily ID greater than 65530 (Product code and Map version will default, leve copyright info blank.

Fill in the name of the compiled TYP file you want to use. Jan will be able to tell you what this will be called and where it will be stored.

Remember to tick “Install in Mapsource” then click start.

A message will appear, click on Yes.

If you want to remove a map from mapsource. Then select it in the mapset installed panel and click on uninstall.

DOWNLOAD FROM MAPSOURCE TO GPS

Go into Mapsource. Your custom map should be in the list of maps. It looks a bit strange in Mapsource but don’t panic, it will look better on the GPS.

Download the map to your gps using the normal mapsource functions to select it and transfer it. NB you need to select all maps that you want on the GPS as Mapsource clears all maps from the GPS as it’s first step.