You need the VAG-COM software and an approriate cable mate. You can use the trial version of the software, and purchase the cable off ebay for about 20 quid.
My front right ABS sensor is faulty, which prevents the ESP, ABS, ASR and EBD (did I miss any?) from working, but I'm not really fussed as that allows me to 4 wheel drift the car.
if you're close to Hull, i'd be happy to read the ECU myself.
Si