Change position registration point

Hi guys,

I have loaded an external image into my flash file and added two listeners: one for the MOUSE_DOWN and one for the MOUSE_UP in the way to make rotate my loaded image on DOWN and make it stop on UP.

Well, il works great but the problem is that the registration point of the loaded image is in the upper left corner of the image it self and for this reason the image rotates around that corner and not in the middle. In this way the mouse is not allways over the image.

How can I change with AS 3.0 the registration point? It’s possible?

Thanks,
Martin