Loaded movie resizes stage, urgent

I have a .swf which loads another .swf. In the second .swf there is code which expands it to the size of the stage. However, I want to put a wrapper around it so I don’t want the second .swf to fill up the stage. I don’t have access to the code in the second .swf. Is there any way I can set a width/height on the second .swf or resize the stage to make it bigger creating room? I have searched everywhere and so far nothing has worked. Any help would be greatly appreciated, thanks.

fyi i’m using the Loader class in AS3.0 and I tried myLoader.width=400 and myLoader.content.width=400 and neither of them worked.