Mouse control (Grand Theft Auto 5)

Hello. As is known in the settings of GTA 5 you can set mouse controls clicking and holding the left button. This method is not suitable for me, as I should preferably almost always a mouse and I drive and your finger gets tired after several hours of play. The option to include permanent mouse control in the settings also does not suit me, because looking around in the car I often.
Is there a script modification that allows you to turn on/off mouse control with
keyboard buttons? If it does not, then I ask knowledgeable people modders (not for free of course) to write me this script as in the more formally I am a complete ignoramus.

Please help who knows! For me this is very important!