img is to transfer directly in your unit (Map folder: anyname.img) NOT a mapsource installation, to have the map in mapsource you need the gmap folder ,as said before, in the correct path.
The one in post 2 I'm afraid wont let the use of search in gps, better to copy the img directly in the gps unit.
The gmap3d.img goes in the same Map folder,if locked ,unlock it with Fast IMG Unlocker.
[Only registered and activated users can see links. ]
To see how it works look here
[Only registered and activated users can see links. ]

Regarding your nick send me a pm with the old and the new nick and your profile adress.