Wrapping collision area around a modell

Hi all,

I haven’t been reading properly (about collisions) , and have been trying different things out to get a collision area around a car modell. I finally got a nice tube around it, but unfortunately the CollideInto only works properly with it. If I’d only have one object to create a collision with, it wouldn’t be a problem, and now it seems that all my effort was all for nothing. Does anyone know what I should use to get a nice wrapping collision area around a model ? (if it was a round object, a sphere would do, but it isn’t )

Many thanks in advance for your effort.