The problem is that I don't quite understand how to open them. I don't have any problems editing the missions of the Warlords themselves; I've already done everything I wanted to (in the map editor, through resource, open resource, and found everything in AdvMapDesc), but I don't understand how to open the mod specifically. I tried opening resources, but I couldn't find it. I tried unpacking it from the mod's archive, but I couldn't figure out what and where to put it. I tried simply copying the map from the mod as a regular map into the maps folder, but it gave an error...
I apologize again for the misunderstanding; I might be a bit slow sometimes, but I haven't really done this before.
+ Maps from the vanilla game have non-standard file names, map.xdb.
It seems that renaming them is enough, but there's also a map-tag file that seems to reference the map, and I don't know what it's for and what might break if I mess it up