2002 CD player installation

the stock cd player/receiver set-up in my 02 corolla is weird the receiver is up top then the ac and at the bottom (right near the cup holder) is the actual cd player.... its hard to explain... but my question is how would i go about installing a new head unit in it, if i put it up top, what would i do with the extra 2 bins at the bottom.... help me!!! My AIM is LACYBOI, thanks