SOBB Vice City Beta Vehicle Arsenal is the most complete and accurate mod you will ever find, made with the utmost care for every vehicle featured.
Everything is recreated using a variety of reference sources such as pre-release screenshots, video clips, trailers, images from the official strategy guide, and game remnants.
The installation of this mod is focused on ease of use! Instead of replacing each vehicle, you can install an additional img file with everything inside and it should work fine with it in the game, you just need to follow the instructions included in the download. Be sure to use ASI Loader or CLEO for this.