first problem:
I managed to make a truck drives around in circles yay! But I can walk through it… 
It is build up with clip brushes and then I selected them all put it as a script_mover with key model and value path/blitzbody3.md3
and the box for solid is checked, so i dont know why it isnt solid.
second problem:
I made a lift, which is triggered by a trigger multiple, so if you stand in it it goes up, but that isnt happening, when u stand in it it flys off to the left !?!?! pretty annoying lol.
that is a trigger multiple attached to a script_mover that via a script knows to go to path_corner.
Any ideas to fix it?

