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 "Primary Engine Mod (Replacement)" folder, pick only one DAT (VDK Train Vol## [...] PR Engine Car v2.dat - This is the main train engine 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 "Secondary Engine Mod (Addon)" folder, pick also only one or two DATs (please check for more information in the Optional file Section) file for adding additional trains to your rail network.
  For the best result choose one with the same name as your main rail mod. 

You can only have one Passenger Train mod ([...] PR Engine Car v2.dat) installed at a time from this package. If more than one mod is installed, only the last mod that is loaded will show. To get the mod to work properly it needs to be loaded after the Network Addon Modd. You can do this by installing  the mod in a subfolder to the Network Addon Modd.

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and by using either the newer nos.17's SC4 Cleanitol or the older BSC Cleanitol tool you can search and remove old and outdated versions of these files.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.