It's very simple really

Remove the strip of trim above the glovebox first (plastic trim removal tools are very handy to have for it)
Remove the trim above the radio.
Remove the two screws holding the radio
Remove radio (it just pulls out once dislodged, take the cables off the back)
Pull out aircon controls by pressing from behind.
Pull out compartment below aircon controls

Once you're done drilling and routing the aux cable just put it back in the reverse order. The hardest part is putting the radio back in because all the wires can get squeezed behind it. But it's grand really.