Need help with Tween Class & external movieClip

I have a main swf & an external swf, both of which need to use the tween class for animations. The external swf is loaded into a movieClip in the main swf using the loadMovie() command. Is there any way to import the tween class to the main swf that wiil allow me to use tween class commands in the loaded swf without having to import the class to it(loaded swf) as well.