Brilliant idea dasilvarsa, BRILLIANT !!!!!!!
I've splitted Europe DEM for Mapsource and selected my country's tiles along with the overlapping tiles from CNEU 2013.41
I copied the .img file on a sd card (garmin folder) and in Basecamp I can now see CN as a 3D map, full functional !!!!
I can also select my country's tiles from Europe DEM in Mapsource and create a .img file.
Then, using Gmaptool, I can create a mapset file that has that DEM .img and any road map of my country and see it 3D in Basecamp !!!
This is the way to do it if the road map doesn't have a Mapsource version, so you can keep the Search function.
(the example below is Anavasis map that doesn't have bulit-in DEM info)