thanks jeremiah for the link https://cgcookie.com/blender/profile/jeremiah%20r advised me this site (old version tutorial):
http://www.tutorialsforblender3d.com/Game_Engine/Vehicle/Vehicle_2.html
here is the first short movie:
http://www.youtube.com/watch?v=XdKkj-Ird7Q&feature=plcp
(sorry for the crash at the end...:)
