Dead easy really if you know what you are doing....remove the 13mm bolts holding the caliper to its bracket and the caliper can be pulled clear backwards. Then everthing needs to be well cleaned up, and the new pads installed with all sliding surfaces lightly greased. Then, the piston has to be wound back into the caliper to allow the clearance that the new thicker pads need (there is a special tool for this but you may get by without it). Bolt the caliper back on, press the brake pedal and yank the handbrake a few times to readjust things.
John, May 2008