when you have your mission in the editor open, you can merge the data and mark as saveable. then when the ports come out, click tools and select edit location mode. Now you can pick up harbors an move them even to the middle of the ocean. Delete the harbors that you dont want it the game. Also I have notice that you can copy ports. If you didnt mark the data as saveable then your ports wont appear where you set them in the map. Another thing. If you have the map location edit mode on under tools, you can right click on the map, select add location, then a property windo will open. there you can insert map 2d data or 3d location. I just found this out, didnt know if anyone knew.
