I unscrewed the phillips head screw that holds the lights in, but can’t take the assembly out. I don’t know what is holding it in there, maybe old age?
It should slide right out… Theres a little clip that slides into the side to hold it in position, but that shouldnt have a strong hold on it… Hmm, i donno, try to carefully wiggle it around a bit and see if that loosens it a bit, but be careful not to break it 
OKAY, take dem screws out rite, dont lose em, then with both ur hands grab onto the lense and pull towards the front of the car as hard as u can… i say that becuz ur clip thingies are prolly rusted beyond recognition… but dont pull too far, cuz then u’ll brake dem wires for the corner lites, aite newbie good luck 