Remove the engine cover.
Then remove all the coil packs, can't remember whether the bolts a ribe or torques, but a torques 30 will do the job. Also remove the three bolts on the brass look plate under the coilpack. If you have pulled the coil packs off each of the plugs then just lift the plate with the coil packs. Use the plug spanner and remove the plugs. Make sure you mop up most of the oil if there is oil down the plug holes.
Put the new plugs in and tighten until they washer meets the cylinder head. Then I think you have to tighten it by 3/4 of a turn as the washer compresses.
Reverse the process for putting back together.