Replacing rear brake light bulb

[Sabon]

I've got the replacement bulb for my 2003 Jeep Grand Cherokee and I'm trying to figure out how to take off the right rear tail light so I can replace the bulb.

I've gotten as far as opening the tailgate, removing the two screws that hold the black plastic on the tailgate opening, and then the two screws underneath that. There is one last screw that appears to be INSIDE the tail light. I'm stumped. Anyone have any clear instructions, and better yet clear pictures or drawings that show how to remove this?

Thanks in advance.