I have a problem with the gmap3d on my nuvi 765T.
I found one (377.800KB) which should be working on CNE 2011.32 but when I start the device it says that it can not unlock the map. The problem is not the 2011.32, it's working well, but the gmap3d because when I rename the extension .img to .old or whatever it does not give this message.
Do I need to unlock gmap3D? When yes, how do I do this and do I need a map-ID?

Can also sombody tell me where the *.sum files (with the same names as all the .img) in the Garmin folder are for?

Thnx,

Ceefman