As far as I'm aware Darthmod v8 uses several different maps. That means you have to put the custom_tiles folder and custom_tiles_db.txt file in each one of campaigns that you want to use. You'll also need to adjust the descr_strat file to place the resources as mentioned in the top post. Remember you'll need to adjust those coordinates _and_ the coordinates in custom_tiles_db.txt so that they match, otherwise the battlemap won't be where it appears to be on the strat map.

If you want to find coordinates for other maps I recommend putting the tile you want to place the battlemap in and typing show_cursorstat into the Romeshell console. It will then tell you the x, y coordinates of that tile.