Hi there should be a rectangular panel on the bottom with a single star screw(chrome) remove this and it will give you access to the lamp, remove the two retaining screws on the lamp (they dont come out of the lamp housing they are captive screws).then give a firm pull using the small metal handle and the lamp should come out. put in the new lamp in reverse order as per instructions.
best of luck
Baby Spice(Emma Bunton), June 2009