The settings I use (and unashamedly ripped off from one of either ThunderGod or AngerManagements posts ;) ) is:-
Expresso Thermoblock Temperature: + 4
Steam Thermoblock Temperature: + 10
Steam Pump Rate: - 0.2
Ive written them down in the back Advanced Programming Options area of the Instruction Book so that if I have to factory reset the machine, Ive got them handy and in the right area Im reading through.