Hmm. I do know there has to be some way. I know of a couple items involving RLV that can in fact force someone into ML (that part I can do) but once in mouselook, they do force the wearer to look only at a selected object or a selected avatar.
the problem I found with what you suggested, is that while it simulates the view of mouselook, the camera is detached and not controlled by the mouse. I know that sounds like exactly what I want, but there is something different about the feeling when you can still move the mouse, have it slightly adjust the view only to have it forced back to the target view.