Finding stage size of swf loaded into a movie

Hi,

Does anyone know how I can find the original stage size of an SWF that has been loaded into a parent clip via MovieClipLoader? In the child clip, there are a number of elements that extend beyond its stage, so when I check the _width and _height properties, then they include the stage overlap.

I tried using mc.getBounds(), but it doesn’t seem to give me what I’m after.

thanks
Marcus.