Types of engine color schemes:

A side note on the engine mods from Volume 10 and Volume 14 SC4D LEX Legacy - BSC VDK Train Mods Vol11 and Vol19 North American Passenger Cars (VDK Train Mods Volume 11 and Volume 19 A-B). In the names there are used numbers and letters to indicate different types of color schemes.
Where types are indicated with numbers (e.g. NP1 and NP2), the real life trains were either seperated on different systems (commuter/intercity) or by time period.
Color schemes indicated by letter were used concurrently on the same system (eg. Amtrak a,b,c).

Installation

Extract the z___BSC MODs parent folder into your Plugins". 
It's gonna install the following paths with two additional subfolders at the end:

• Z___BSC MODs/VDK Automata/VDK Train Mods

• From the "Passenger Cars Replacement" folder, pick only one DAT. Each liveries (folders) contains 3 versions of the replacement passenger cars, you need to choose only ONE liveries and only ONE replacement car version DAT file from the chosen livery folder - This is the main rail car mod file. This download will not work with any other train mods installed! Make sure that this mod is loaded after the Network Addon Mod (the provided z___BSC MODs folder actually ensure this), otherwise the new UDI icons won't show up.
• From the "Passenger Cars Addon" folder, you can choose to install any numbers of mods of the additional type, but only one of each car type (car1A, car1B....) of the additional mods can be used simultaneously. - Please see more details in the readme.
  These can be in different livery.
  These passenger train car mods can be used with cars from SC4D LEX Legacy - BSC VDK Train Mods Vol11 and Vol19 North American Passenger Cars (VDK Train Mods Volume 11 and Volume 19 A-B).
  For the best result choose one with the same name as your main rail mod. 

Due to first the Project ZIP efforts, then the SC4D LEX Restoration efforts in order to make the folder structure more unified the original install location (VDK Automatas BSC) and the file names have been changed.
To avoid conflicts, please, it is highly recommended to use any of the third party cleanitol tools and remove any previous versions from your plugins. In the ~Documents folder in the main ZIP you can find a Cleanitol_BSC VDK Train Mods[...].txt file and by using either the newer nos.17's SC4 Cleanitol or the older BSC Cleanitol tool you can search and remove old and outdated versions of these files. 

The letters on the pictures above, helps you to pick the file you want to install.
Remember you can only have one PR-train mod installed at a time.

Please be aware that the problem with "ghost trains" as state below in Known problems will get worse with the numbers of cars installed.

Uninstallation:

To uninstall these files, simply delete them from your plugins folder.

Known problems:

When using custom automata mods the game will occasionally show "ghost trains" just after loading (trains showing up just outlined, or only partly visible).
This is normal, and nothing to worry about. The more train mods you have installed, the more this phenomena will be noticed. Sometimes it will persist even after the initial loading of the map.