The Jeep's Brembo's are great to work on. The pistons can be retracted into the caliper very easily. (Careful you don't overflow the brake reservoir). With the pins out push the inner pad away from you with your two thumbs on the 'ears' and it will set the pistons flush into the caliper. As shown put in a wedge (small screwdriver) and then pull the outer pad (by the ears) flush with the outside of the caliper. Thus all 4 pistons are flush with the caliper and the new pads will drop right in. Don't fight with all 4 pistons independently.

Brake grease on the pad to piston surface, and the pins and you are done.