After removing the screws securing the keyboard, you will need to flip the keyboard release switch to the left (in previous step). You should feel the release slightly make the switch less springy

There are still clips on the sides of the keyboard holding it in, so you may need a prying tool to remove the keyboard (eg. spudger, guitar pick). This shouldnt be too hard

Since the keyboard is made of relatively flimsy metal, you may find that if you pull too hard you can bend the keyboard. It's usually correctable though.

Don't completely pull out the keyboard as there is a large ribbon cable connecting the keyboard to the case. To remove this, flip the black part of the motherboard connector UP. This will allow easy removal of the ribbon cable