The car_tutorial.zip file you have requested: Tools and Utilities / Car Tutorial - 215.1kb is not available. Perhaps try browsing all files for the game Grand Theft Auto: San Andreas and upload any files you want to share or are missing. This is the only information we could locate:
This is a nice tutorial which explains how to get new car models/skins in the game. This turorial does NOT explain how to make the skins on your own.For those who have difficulties with getting a nice skin in the game, go download this and it should help you out!