Disregard ALL of the previous answers. It takes less than 3 minutes.
Step 1. Remove the single screw on the memory bay cover.
Step 2. Remove the two screws - one at either end of the bay.
Step 3. Release the 4 clips between the function keys by sliding them downwards.
Step 4. Slide the keyboard upwards and outwards.
Carefully pull out the zero force insertion ribbon cable.
Replace in reverse order.
These instructions are also for replacing the cd/dvd drive.
JOHN KEITH SWALLOW
January 2009