OK I used Chris's instructions and a couple of extra things that he told me about so here is a slightly more detailed description with pics.
1 - First pull out the ashtray and undo the screw behind it.
The ashtray just pulls out with no significant force needed. I just pulled on the open lid.
2 - Pull up the gear stick surround and undo the 2 silver screws at the bottom left/right of the storage bin.
This takes a bit more force, I pulled from the back near the handbrake and levered it up with my fingers. I also pulled off the shift knob at this time but you could probably do it with it on but I thought it would be easier with it off. There are 2 screws at the front of the knob, put the shifter right back in low to get easier access. It takes a little bit of maneuvering to get the surround over the front of the shifter indicator and be careful not to scratch the vinyl with the hard edges of the surround. Unplug the lighter, lighter surround light and steering wheel shift switch. All plugs have a release tab, push it in or you will get real cranky trying to get em off.
3 - Using a thin flat blade screwdriver on the left side, prize out the 2 vents at the top of the console and disconnect the unit.
This is the panel that houses the 2 vents and the hazard switch. I used some masking tape around the screwdriver to avoid scratching the vinyl when levering. Unplug the plug at rear.
4 - Undo the 2 silver screws at the top of the heater controls.
5 - Pull out the heater controls, radio & stage bin (all in a cage together).
I put some toweling over the lower console area to avoid scratching the vinyl.
6 - Remove the radio from the cage (2 screws each side) and fit your radio.
I undid a couple of extra screws to "open" up the cage a bit to allow the radio to be removed and the new one installed more easily and without scratching anything.
Mine had the aerial adapter already fitted as there was already an aftermarket deck installed but the previous fitter had butchered the wiring loom so it was a bit more work to re-wire all the wires in a decent manner but if you are removing the stock deck then get the correct plug adapters and aerial adapter available from Chris or some auto outlets. I also bundle any wire slack in some padded tape to avoid any rubbing or rattling later on.
7 - Refit going from step 5 back
I connected everything up and tried all deck functions before re-fitting the cage permanently just in case but luckily for me all went to plan.
Hope this helps, Mark.