Rename your downloaded mod files (typically .wft and .wtd ) to match the car you want to replace in-game (e.g., rename them to comet.wft and comet.wtd ).

: Always create a backup of your GTAIV folder or at least the pc/models/cdimages/vehicles.img file before making changes. How to Install Russian Car Mods

: The standard tool for accessing and replacing game archives like vehicles.img .

: Recommended for the "Complete Edition" to install mods without needing to downgrade your game version.

: A simpler, automated tool that can install car mods directly from archives (7-Zip/WinRAR).

Open the installer and select "Vehicle install from archive". Browse to your downloaded Russian car .zip or .rar file. Follow the prompts to select which in-game car to replace.