You do not need to remove the whole cover, in order to replace the keyboard.
The description for this job is right.
The switch plate cover just pops off.
Screws revealed, secure the keyboard.
Unclip the ribbon cable.
It is not neccessary for a full strip down, just to get at the CPU. Access from the main cover, remove fan and heatsink. The CPU can now be removed as in the final steps.