To get the materials to show up in 3DS max you need the kuju plugins, these are available from the RailSimulator website:
(I don't use Canvas, but anyone willing to do a canvas version of posts please contact me)
Follow the read me inside the downloadable zip to install the plugins for 3dsMax and Photoshop.
Once the plugins are installed start Max.
Enter the material editor and click on the Standard button (1)
In the list click on the Kuju Material (2) This then put the kuju list of materials in place of the standard materials.
Click on the arrow next to the default RWs material TexDiff (3)
The full list of kuju materials show.
RailWorks/Simulator only uses a few of these materials.
End of Part 1