Create a Movie clip on the Fly

I want to be able to create a movie clip on the fly, inside another movie clip, not duplicate, but create an instance of a clip that only exists in the library. The movie clip that the new clip must be created in is going to have a loadMovie already applied to it, so anything existing in it will be removed. I need a way to insert a clip from the library into this parent mc.

I tried attachMovie() but its not seeming to work.

Any one have any suggestion? :pac: