Ok, I decided to make a new tutorial, in the form of a library. I give to you, the Car Physics Pack! An easy way to make a racing game with alot of variables in a short time. It uses simple variables, too. Like speed, direction, acceleration, and deacceleration, to tune your game to the max. If you like it, I can add better collision, though it's easier to program it yourself because of some details.
Download here. (do not save target as!)NOTE: It's currently an extension for GM7, make the move nao!