Have you seen movement of the camera on matrix?
it goes on a circle around the object but goes down and the up while doing that circle movement.I've tried doing it with a nurbs circle and creating a motion path with the camera..then changed the vertexes so the the circle was down and up (like the movement) but the camera doesn't exactly look at the object straight but it follows the up and downs..I hope you understand..

Please help! :-)