you must own Train Simulator: Train Simulator: SW1500 Switcher Loco Add-On from steam
1.Drag and drop the assets fold into the Railworks folder
2.Go into the SW1500Pack01 folder and copy the SW1500_01.GeoPcDx file from the Default Engine folder and place it in the BRG Engine folder (Railworks\Assets\RSC\SW1500Pack01\RailVehicles\Diesel\SW1500\BRG\Engine).
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