The only comment I can do is this: download pc version install it and unlock it
You'll have it in Basecamp, send the regions you need to your device with Mapinstall.
Don't use Mapsource because IMGs created with new CNs can have routing problems in devices. Mapsource is discontinued.
All other options are wrong and will give bad results.
Correct procedure for splitting an img for Mapsource here:
[Only registered and activated users can see links. ]
But Gmaptool cant create a valid MDR files for Mapsource so every Gmaptool processed img wont have address search enabled.