Well I've been also trying to do the same thing with Live Motion and I don't think it can. It will tween only if your are making size, rotate, scale and colour changes to it, but not morphing type of tweening. I think that's where Macromedia has the edge. I could be wrong, since I haven't been using Live Motion for very long. There is no documentation on this type of motion in the manual. Hope someone else out there has a solution.