After almost breaking my tail-light trying to replace a light bulb, I figured I'd share what I have learned: The procedure is the same on both sides. There are 3 screws to remove. Pop the trunk. Right above the inboard side of the lense is a phillips head screw. Remove it. See Picture #1. Gently pull the inboard side of the lense out about 2 - 3 inches. this should provide a gap to pry away the outboard side sub-lens. See picture #2. This will reveal two more phillips head screws.Remove them. See picture #3. 
