Theres a nice feature on GP4 that when enabled reduces the sensitivity as the speed of the car increases....

this helps a lot if your using a pad...or keyboard or anything like that..

Readme.txt

I dont get it....

you mean there already something...? how do I alter it..?

1) Open up the console/chat-window by pressing T
2) Enter "/speedreduce 1", hit return (then repeat step #1)
3) Enter "/reducehalf 33", hit return

"/speedreduce" controls the amount of speed sensitive steering reduction. 0 means 0% (min), while 1 means 100% (max).

"/reducehalf" sets the speed (in m/s) at which half of the reduction should occur. So if you enter 33 (=120km/h) then at this speed you will get 50% speed reduction. The "half" part is used because IIRC this is not a linear reduction but a reduction curve, but don't ask me any details about that