I will try it out later. Do you have to use the Region plane of the map provided by CA? Or can you create your own plane and use those coordinates? Because using the region plane of FOTS is really not optimal.
If you create new regions, sea regions, settlements, towns,...etc...Do you have to add this to the db file and overwrite the existent regions, settlements, towns,...that is provided by CA? Or can I leave that data inside the db file and I add just those new regions, settlements,...to the db file and convert it, without erasing the vanilla data? Also in the material editor, can I overwrite the materials that I don't use and replace them?