Patience, grasshopper...
If you cannot fit a philips screwdriver onto the two screws that hold each lens in place then remove the housing, you may be forced to remove the entire assembly. Do this by removing the inside trim on your tailgate then removing the two nuts that hold it in place with a 10mm socket. That's how I did it, then again, I was modding the assembly it to fit on the tailgate of my Samurai...