Yes, you can do so safely, but that shall not be enough and not work like that so easily in a prototype. Once it is changed in the Regions.xls, we shall also generate the corresponding ini files (see Areas.ini).
As for the names printed on the map, this is purely cosmetic... what shall be done is to list Areas and Theaters initially, then tell the artist to include those name inside the map, if need be...and that won't be changed later if we decide to alter names (or we have to "redo" the map graphics)
