Can somebody tell me if its possible to change the place of the audio system ?

like right now i got my Airco on the bottom
but below the airco i got a open space i am not sure what its used for
but is it possible to move the airco a bit down to cover that space
so i got 2 slots open to install a other cd player and a gps
or a gps only like the kenwood DDX8027

anybody got a idea about this ?

i got a small picture only atm from how it is now
http://users.skynet.be/RedWolf/inside.jpg

i will try to get a bigger one if this one is to unclear