its really easy.. you just need to remove the wheels and do one side at a time ( so when youre confused of what it looked like before then you have a reference just on the other side ) .. you dont need to remove the whole caliper to change the pads.. just remove the lower caliper slider bolt, its the one with the rubber boot, then rotate the caliper upwards. with the caliper up and clear off the rotor remove the old pads and take note to how they were installed..
after that pop open your hood and siphon a little bit of the brake fluid and leave the cover ajar (this is what i did since i didnt have any helper around to actually bleed the brakes which is by all means the best method..). push back the piston flush into the caliper using a large c-clamp while watching the fluid level in the brake fluid reservoir. install new brake pads, slide down the caliper, install the slider bolt and torque them down properly, put back your wheels and repeat on the other side. visualy check everything and dont forget to put back the brake reservoir cover.
bleeding the brakes would still be the better option rather than pushing the caliper piston back since there is a probability that dirty or contaminated brake fluid can make its way into the ABS unit and cause some problems. but i still went with the c-clamp method since it was my only option at that time.. i did not have any issues after the install and even got a better pedal feel..
hope this helps and good luck!!