Use a tool like WinRAR or 7-Zip to open the .rar file.
The "piece" you are looking for—likely the contents of the archive—typically includes:
The visual skins, including the standard RZD (Russian Railways) livery or specific regional variants.
The geometric data for the train cars and bogies.
Custom sounds for the compressor, traction motors, and the distinctive "informer" announcements used in Russian commuter rails. How to use this file:
Most Russian train mods include a Readme file (often in Russian) that specifies which "Assets" or "Local" folder the files must be moved to.
