NTU version isnt made for older devices, search cant work properly in these devices. In older devices it's better to use NT map. You can find all the separated regions in NT thread.
You can easily unlock Mapsource versions with mapset unlocker in a patched Mapsource-
It's easy to select and save any region in MS and send it to any drive.
Garmin use Navteq maps and save the compilation date you can see in Gmaptool log, the real data date isnt known.