newbie's question

How install the 1978 carshape?,

and is there a tutorial about wheel force feed back , i've got the new thrustmaster RGT pro which is ok in GP4, but i don't know why, i can't use it in GP3. ( sorry for my english)

You install carshapes with GPxPatch.
I used to have a thrustmaster and it was a pain to set up. Could only get power and brakes on the paddles (which broke in a few days) and the setup system was not the finest in GP3 as so much of the thrustmaster was ignored. Keep trying different variations when setting up and don't use more than about 3/4 of the steering. I found that gave reasonable results and avoided tying my hands in knots when driving.

thanks a lot Brianf666, my left paddle also was broken in a few days, maybe the solution is i reinstall my old microsoft wheel?

Or invest in a Logitech. They are indestructable. The Microshaft is known to have quite a few problems with uncentering and drifting.

Ok Thanks for advices