I have the JCV files in the hidden JCV under the .system folder on the unit. I also just downloaded the D2504060A.JCV and replaced the D3084030A.JCV with it.
If you say one JCV file per map, that means I can have both of them in the same folder, one for EU and one for USA, right?
If I would add more maps, I can have more JCV files that come with those maps, like South America or Africa or Australia, right?