How do i link an object to a bone point?

Hi. I'm pretty new to AS and usually use flash for some animation.

now this is what i want to achieve: a snake that consists of a shape IK as a tail and a Movieclip for the head to be able to do some eyes and mouth animation.

Is there any way to link a Movieclip to a bonepoint of an existing bonestructure in a shape-IK?

I hope this makes sense to anyone

Thanks

Dave