Hi
It can be done with waypoints and the correct script to follow, also you need to adjust the weight/gravity properties of the entity you want to move,
if you check out this waypoint tutorial using a lift and replace the lift with the table or what ever, but the theory is the same.
http://www.fpscreator.com/video_tutorials.html
Sorry to send you on a link but I'm at work and don't have access to my scripts etc!! It may also be worth while looking at the poltergeist room bit in the community guide but I cant find it right now