Open data\config\player_cars.xml in Notepad and paste the text snippet (often found in the accompanying .txt file) before the final tag.
Downloading files like or multi-part archives for City Car Driving is often associated with unofficial mod installations or older distribution methods. Download City Car Driving part03 txt
If you are looking for a reliable way to download and manage the game or its components, 1. Official Game Download Open data\config\player_cars