Ok, this is what I did. I added a cube, fitted it to the shape of my vehicle, and then went to object mode, to the object tab, and selected "Bounds" for draw type. Is this all I need to do for my collision box, other than naming it Col, parenting it to the empty (Col0), and parenting that empty (Col0) to another empty (Shape)?
I also parented all my armatures and meshes to Detail32 and parented Detail32 to Shape.