Remove the 2 screws holding the front of the shield and the one holding down the floppy drive (disconnect this and place to one side).
Bend all tabs straight upwards ... Be advised that there is a hidden tab up by the mouse port which is folded the opposite way to all the rest - it sits between the metal shield and the case (crafty buggers lol!)
Give the shield a little wiggle and it should separate with some minor coaxing.
