Mapsource
Mapsource can be bought in it's cheapest version in a package called Trip and Waypoint manager. To download it for free: Download and install from garmin's site training center software and after that update mapsource.
As far as T4A is concerned. The main routes East and West Africa are on the map. South Africa, Namibia and Botswana are very, very detailed. The further north it is more or less the routes usually traveled. Northern Africa is, thanks to the Italians much more detailed again. T4A is not free BTW.
If you have Mapsource you can use free programmes (Google to search) to download Waypoints to your GPS.
You can also create Waypoints yourself with Google Earth.
Henk
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