@paddy - is the iTunes logo a blue orb or the old icon with a CD in it?
You'll need to jailbreak first and then it will activate the phone to get past that screen. Then determine basement version and perform the unlock.
Not too sure what the iTunes logo looks like - will have a look this evening. Will jailbreak it this eve and let you know how it goes.
P.S Carbon Fibre Skin is awesome! Will take a pic soon - been moving houses so things are a bit chaotic.
Peace