No clue, I can't see the heads of the screws. They're sandwiched between the particle board rear deck and the sheet metal in the top of the trunk. They go up through the grill. I think my solution is to remove the rear deck, but that's a huge problem in itself.
Well no doubt its going to be a pain in the ass, but my suggestion would be get a Chilton manual for it. That will give you step by step instructions on how to remove em. Should run you about $15-$20 for the manual.