A trim stick helps, but a big screwdriver works too. Pull down and carefully remove the plastic center trim just inside your tailgate on the ceiling. It is held up by several metal clips, and has plastic tabs on the left and right sides. (These metal clips are what you're dealing with holding most panels in the jeep in place.) Then, once the center trim piece is off, you can pull the side panels in, beginning at the top. The clips will disengage from the wall with a little tug, and you can get halfway down before you realize you have a screw to remove. You will need a torx bit, as I remember, to remove the screws attaching the black metal gear anchors that are just inside the gate opening to the interior wall. Once these are out, the rest of the panel pops off easily.
2008 Liberty Sport 4x4 Automatic