I want to build a 2dof sim,,,but have a lot of questions.

1) what is more realistic...screens fixed on floor ,,or screen moving with the platform.
2)i am going to use 3 screens,,,can i put 1 larger screen in the middle and smaller on the side?
my idea is to use LG 29 inch ultra wide in the middle, and 2 normel 29 on the side.
3) is there software to ´´stretsch´´the lets say the hole front windscreen of the car on the middle screen(ultra wide) and the side windows of the car on the other 2 screens? i think id would be a little more realistic this way.
If i can discide (with the help of this forum ) wat too build i can start looking for a good design and motors enz enz..
thanks for helping
Dick