As above, how do you remove the heater controls for a MY93 WRX?

I've found two screws in the two outer control knob positions, but after removing these there's still somthing holding the thing in. Is it held in with clips or are there some more screws that I'm missing?
I need to replace a couple of bulbs before it gets dark for the winter!

Thanks for any help, and sorry if I'm missing something obvious!

http://bbs.scoobynet.com/scoobynet-general-1/493181-how-do-you-change-bulbs-behind-heater-controls.html

Many Thanks,

Will hopefully have a go at this shortly.