One player from Estonian community asked help from me lately, to use the script system (push to change brake to clutch) with his Logitech Formula Vibration Feedback wheel. I haven't used that wheel, so I knew nothing about it. But it seems that it has brake and throttle combined (that's what it shows, you know what I mean)

So I thought, does anyone know a solution or throttle/clutch combined trick?

When launching the car you need to apply both throttle and gas. Two pedals at the same time. That only works with two seperate pedals. So dead end there.
But when you have seperated pedals you can grab a script from here and edit it for your setup.

Vain