Pretty easy, really.
Take your wheels off (have car on stands first, just sayin'), then undo the bottom caliper bolt and hinge the caliper away from the disc. Remove the pads and install new ones then bed them in. It's recommended too, if you can, to have the rotors machined. Best to have new pads and disc surface, otherwise, the disc surface will be "worn" into the old brake pad and you can risk cooking your new pads.
For what it's worth it might be more simple and convenient to just replace the rotors at the same time. Being an MY02 N/A they are probably still the originals anyway. Unless of course your service records state otherwise.
OR
You can hang out with Mark, drink his beer and watch him do it