1. Install ScriptHookV (http://www.dev-c.com/gtav/scripthookv/) if it's not already installed.
1.1. If you had a previous version of this mod installed, delete the "RemoveVehicleJitter.asi" file from your game directory.
2. Place both VehicleJitter.asi and VehicleJitter.ini in the game directory.

The jitter effect will be automatically adjusted at game launch based on the settings in VehicleJitter.ini. By default, it is set to 0.
If you change the intensity value while the game is running, use the in-game "vjreload" cheat to reload the config without restarting the game. If successful, a notification with the current intensity value will appear. You can also change the reload cheat in the config file if needed.