The Razer Analog Keyboard Setup is a mod that allows user to input file that allows for driving and movement.

You will not have functional analog movement in reverse just make sure that the S key is bounded for S. Trying to bind the left stick Y axis to forward and reverse results in your car driving like its got the E brake on.

To install, backup your inputUserMappings file, download the file and place it in the folder, go to synapse and bind the W key to left joystick up, A and D to left and right, and leave S as S. After these steps, you can now walk, drive, and run at your own like a normal person instead of a coked up Dale Earnhardt.