Dear catymag

I tried hard to unlock the maps on Mapsource but I couldn't find a way. I learnt how to unlock the .img on the handy but when I want to import a smaller map like SwissAustria back to Mapsource I get the error message that Garmin City Navigator NT 2010.31 (Swi & Aus) ist not installed. Isn't this a subset of City Navigator Europe NT 2010.3?