You need to replace a save file with the one that you downloaded. Put the REEFER DOUBLE in mod folder then Start the game loading the save called ETS DOUBLE TRAILERS. Don't go and buy a new truck if you do that when you have the doubles the game will crashYou can use any truck that replaces the Scania r cab Class A This mod is god for one transport only that is the best that I can do for the moment
