Child animation on grouped objects.

Hello.
I imagine this is quite simple. But I haven't figured it out yet.

This is what I have:

I want to animate the group (parent and child), with the parent's registration point as the group's point.

And inside this animation, I want to animate the child with it's own registration point.

I've tried creating a movie symbol. But then I don't have access to the child object to animate it.

Thanks a lot!