You can do it by taking off just the grill sections on the far right and far left of the dash...
1. Lever out the 4 heater vents with a flat screwdriver.
2. Remove the 2 screws on either side on the top of the heater hole thingy; there is holes in the middle plastic section to put the screwdriver thru.
3. Pop the grills off and unscrew the speakers.
Think thats it..
I didnt need to lever out the heater vents. The large part of the vents just spined around 90 degrees (so it was on the side like this | ) and i could get a philips head screwdriver up through the guide holes to undo the screws
Some original photos have not been recovered yet.