Instructions
Download the cement plant .zip file from the Rigs of Rods repository website (rigsofrods.com).
Extract all files in the .zip to the "objects" folder under your main Rigs of Rods directory, located in your home folder.
Open the text file named "nhelens.terrn" found in the "terrains" folder under "data" in your Rigs of Rods directory. Add the following line to the end of the file:
1264.340210, 33.825592, 939.361023, -0.000000, 0.000000, 0.000000, cementplant
Save the file and close it to complete the installation. The cement plant will now appear on the Nhelens map, ready for use.