can't get vehicle armature to work

“align the mesh origin this way” what does this mean? How do I align an origin. Also the bones have a different origin to the mesh what origin do I align the root bone to?
when you say place the bone at 0,0,0, are you referring to the exact center of the grid?

ue4 makes a default uv mapping so no I didn;t add one.

Does this mean that the actual alignment of the mesh contribute to the failure? What if the wheels were bent for artistic looks?!