Finally found the thread I was looking for. A few tips hee;
Changing brake pads on EB
It's not at all difficult (famous last word) to do it yourself.
The rears can be tricky, the piston needs to be rotated and pushed back into the caliper (until the thread properly engages) then screwed back all the way. I have managed this with various tools that you would find in any toolbox (pliers, vice grips, screwdriver combo's) and a bit of ingenuity & dexterity. You don't really need the
special tool.
Remember to free-up the slides as well (many garages don't bother) for the caliper to function properly.
Zantetsuken also has a run-down on what needs to be done in his article on replacing brake rotors;
http://www.geocities.com/polar988/rotor1
You'll never learn if you don't have a go.