Accessing Library of externaly loaded swf

Hi I have a swf file which contains in its library couple pictures.
After it is loaded using preloader I would like to be able to create couple instances of them and add them to the stage

If I use swc approach and import it in library path I can not preload it but instancing is very simple i.e

public var pic:Pic1 = new Pic1();

and that’s it, I can add it then to stage then.

How to access them when doing it with swf and loader class???