Last Month the Japanese try to retrive this mod a little bit more. They played in the at 2pm CET. At the moment the gametracker,com Server Monitorring is off. Hope soon they turn it on. The ranking seems to work.
A folder means a folder, it can be called anything, I used ED42 in this example as I think it makes more sense than BFDEV that is used in the official readme.
If you want to create a new map from scratch then I recommend you do so from Battlecraft, and then extract the empty map into the folder.