just open the Map extractor and Importer, then find your rvforest, then click import (you might have to check the export with building coordinates box, idk i always check it for no reason) then find the river race's .map file that you downloaded and click it. now it says import successful or something like that, now open your rvforest with actoolkit, it will say that checksums are invalid, continue? click yes, now save and you're done.
btw i added 15 new towns to this page >> THIS << and im too lazy to compile them and put them here, so go check'em out.