@raspi: when you have a *.img from a Topo Pro with Activerouting (with sql-database) and you use Javawa Mapconverter to make a Mapsource installation and then/or a gmap-installation you have manually make a Addition-map with the sql data and also manually make a info2.xml file. (That's my experience).
When you have an example of another Topo Pro gmap, then it is not so difficult.