[mkgmap-dev] Convert from gmapsupp to mapsource map or the other way around?

Hello, I want to use the latest trunk version to create a gmapsupp.img file with address search. If I want to have both, a "garmin map" for mapsource/qlandkarte and a image file for the GPS device, is it possible to do this in two steps? Create one of the two first and then convert to the second format? Yours Manuel