Underneath on the back edge you will find two screws, remove these. Then turn the laptop back over to it's normal position, push the screen as far back as posible, as you look at the power switch panel where it covers the centre hinge point on the bottom of the screen panel you will find that you will be able to lift this and remove the whole plastic panel.
This will reveal three screws that retain the keyboard, take these out and lift the keybord free from the laptop, be carefull here as there is a ribbon connection on the lower edge.
As you look inside on the right hand side you will see the rear of the DVD/CDRW drive, there are two screws, remove these and push the drive outwards!
Refitting is reversal of removal..
Hope this helps
Alan