Replacing the Pads
The caliper is the large clamping device that presses the pads against the rotors. They are probably tightly clamped to the rotor but you should be able to wiggle them enough to get them to separate. If they are really stuck, you may need to carefully pry them open. Take a good look at how the caliper and pads are sitting in place so you can put them back the same way. This might be a good time to get out your digital camera.The pads are notched on the bottom to hold them in place, but not on the top, so the top will rotate away from the wheel first. Then pull them up and away from the bottom.
The caliper is still attached to your Jeep by the brake fluid line, so be careful turning it over to remove the pads. Before I remove the pads, I use a hand clamp to compress the caliper completely to make room for the new thicker pads. You may want to keep an eye on the fluid reservoir while you compress the caliper piston back as it pushes fluid back into the reservoir. You don't want it to overflow and make a mess. You can use a clamp on the inside portion and in the center of the inner pad. Pushing on the center of the inner pad applies the opposite force to the the caliper's braking force.