Thread: BackCountry Navigator PRO up to v5.4.1

Got the prog., and it is working nicely.

First post states:
"Preload offline topo maps, aerial photos, and road maps on your storage card, so they are ready when you need them for your GPS navigation."

So, I tried the easy way, and put one garmin map img to 'atlases' to test this, but it did not work (prog. did not see it?); so, how do I get these 'offline' maps work, do I have to DL them all from net to phone, or?
It would be really handy and usefull to have maps already in device, all the better if could use maps from zumo or nuvi. Possible?