Look on the SD card with a card reader, there maybe a guide on how to install the maps to Mapsource
or following this and see how you get on.
Install T4A GPS Maps to your PC
1. On the SD card there are install files for your PC. Insert the SD card into
an SD card reader. Some GPS units, digital cameras and mobile phones
can be used as SD Card readers when connected to your PC. The best
option would be to use a dedicated SD card reader if your PC does not
already have one.
2. Use Windows Explorer to browse the contents of the SD card, look in the
folder called “PC”. Double click on /PC/tracks4africa.exe. This will launch
an application that will take you through the installation steps.
3. The main menu will appear. Click on Install T4A GPS Maps 9.10.
4. You are now at the Install T4A GPS maps menu, click on Install T4A GPS
Maps or Install T4A GPS Maps (Legacy) depending on the type of
GPS you have. We recommend Legacy for 276, 76, 60 and eTrex users.
5. Follow the instructions on the install wizard, then Exit.