While the latest version (1.2.0.43) works with some mods, many modders recommend downgrading to patch 1.0.7.0 for maximum stability and compatibility.
If you want a more "complete" experience rather than individual cars: Fixing GTA IV with 4 Mods (2026 Guide) - Steam Community
Find your desired car on popular mod sites. You will usually get a ZIP file containing .wft (model) and .wtd (texture) files.
To prevent crashes when adding multiple high-detail vehicles, install a Limit Adjuster to help the game handle the extra assets.
