Has anyone changed the 3'rd brake light bulbs in the spoiler?

[MARK C]

Just noticed one of the bulbs in the spoiler is out. How do you change them? I can see the little plate under the spoiler with 2 screws holding it on....But looks like a real bitch to get it off!
Anyone got the trick on how to do it w/out removing the spoiler?
Thanks for any help
Mark