I take it that editting one single map model by exporting it to a .obj file then editing that file and reimporting it and packing it up isn't possible? Not bothering with texture editting and making it so that the models would not have added vertices and faces.
Pretty sure you'll need to change your system settings to display the text properly if you are in windows. Try following this thread here for help, and tell us the results.
So then the map appearances are one 3D model altogether, or are they stitched together with 3D models in the game data that represent each square to make one map itself? If that isn't clear let me know. English is not my first language.
I'd be interested in this as well. I know that the unit distribution/data on maps can be edited (not entirely sure how though), but what about the maps themselves in each chapter?