All done last night, the pistons just need pushing in. The spring clips were the first things I removed then the retaining bolts needed undoing this freed the caliper enough to remove it and the pads. Once the caliper and pads were off I was able to get the discs out, however the caliper holder needed removing to get the new discs in. So everything got copper greese (except the disc brake face ;-) ) The new EBC GD930's went on, then the holders, then the calipers with the red stuff pads - one question, I did not find any cable to plug the pad into, so i cut the cable from the pad off (only on one pad so i guess later S3's had this sensor on one side, or should they all have it?
The job was quite easy, however you will need a device of some kind to push the piston back in - i doubt you could just push it in by hand.
Oh and while your at it you get a good chance to clean th einside of your alloy wheels, all very nice now!