Flip the laptop on its side, optical drive hole up, and use a nice n' long spudger to push the keyboard out through the hole above where the optical drive was. Light always helps to pinpoint the hole.

Once the keyboard starts popping up, get under it with your fingers and pull.

Don't slide your fingers along the underside of the keyboard, you are likely to get cut! I learnt that the hard way as I made this guide. Owie.

On a side note, don't put the screws right in the path of where the keyboard comes out. I lost almost every screw in the picture because of that.

Set the laptop down to normal position, unlock the keyboard connector, and remove the keyboard cable from the connector.