What is and how to make a colliion.joe file

[cologne]

My new scaled F1 bumps around the world and doesn´t like to stand still on the ground. :-)

So i tried to make a new collision.joe, but there is no description how the collision-box should look (F1 has freestanding wheels: Box around the car-body? Much greater than the complete car?) and how to make it.

I made a box with triangles only in blender and exported with "export-joe-0.3.py".

Do i need with the "export-all-joe-0.3.py"-Script? Where can i find it?

Could there another reason, that make the car spring around?