Hey guys--

I know its a long shot, but I'm wondering if anybody talented enough in graphic design to tell me what the sizes of the component slots are in this piece of furniture?

I know the overall height (of the middle piece, not the adjacent towers) is 20" and the width is 54" -- is there a way to deduce the other dimensions using Photoshop?

http://www.audio-video-furniture.com/Common/Product/Images/102/55967-L.jpg