Ok,
Take out the two screws in the bottom. Remove the "bottom plate", the plastic piece held in place by the screws. Push the board upwards, sliding it through the alu. casing. This requires a bit of force, but I have done it several times without anything breaking, so you should be fine. Be careful with the glass. It is semi-glued on to the rim of the LCD, and it will probably come off as you slide the board through the casing. That's ok, just keep track of it.
I followed the instructions
here
kallek