easy, take the wheels off (pop the bonnet and undo the cap on the master cylinder) undo the bolt on the bottom of the caliper (located behind the caliper) 16mm or 17mm (cant remember) youll need to hold the nut just inside the edge of the caliper with another spanner (again witha 16mm or 17mm spanner)
lift the caliper up
next is the hardish part, you have to push the piston back into the capiler, i use a wheel brace to do this and lever it off the opposite egde of the caliper.
slide in the new pads (copper grease the back of them to stop them from squeaking)
drop the caliper back down
replace bolt and tighten
put wheels back on
remember to replace the cap on the master cylinder
remember to pump the brakes before you dirve anywhere!!!!