Launch the game, and the vehicles should now be updated.
Based on your request, it seems you are looking to download and install the . This mod replaces in-game vehicles with real-life 1980s car models to enhance the retro feel of the game. How to Download and Install (General Guide) Download 80s Atmosphere Pack
Locate the models folder (often GTA Vice City\models\cdimages ). Launch the game, and the vehicles should now be updated
Extract the downloaded archive (usually using tools like WinRAR or 7-Zip). Install the Mod: Navigate to your GTA Vice City game directory. Launch the game
Drag and drop the new vehicle files into the game folder, replacing the original files.