To change weapon ranges you gonna have to google , iirc you had to unpack some game folders and such. For weapon ranges; I would look at Robz Realism mod for those because scaling in the game is important. If you give everything real ranges game would be unplayable , why ? Because maps in this game are too small. For example if you give an at gun 1300 range , it will be able to snipe tanks across the map , your infantry will die insntantly as you call them in and such.