US_45ft_53ft_Trailer_ No Loads

I'm doing something wrong.I can only run them unloaded or empty. I installed the flatcars to Program Files (x86)\Steam\SteamApps\common\railworks\Assets\RSDL\USWagons01\RailVehicles\Freight\FlatcarRTTX90\Variant1 Folder as directed. But where do I install the "90000ft/New England/Scenery" folder? I also have the Canadian National SD40-2 Wide Nose RailWorks Add-on from RSC (Steam) installed,as required.