Big Thanks to your help. I have used old trainer. But it's not what i want.. I wanted to attach like object attach. But it's like using a rope to tie up a car. Though very very thanks to you. I almost gave up to receive answer.
I have made many things (like tank spaceship castle...)by using simple native trainer. We can attach objects to player or cars. But I can't find the way attach car to car no matter how i try. Any idea of this? Please help..