Hmm, I think someone posted a thread somewhere on how to change the layout to suit that. Browsing around to see if I can find it again...
Ah nope, that was for N52.
http://www.wowinterface.com/forums/s...ad.php?t=21028
But it gives you an example of how they changed it to set their layout. Basically it involves editing the layout files and using trial and error to get the layout the way you want.