Oooooh.
Well that sucks.
I think there is supposed to be something you do to let the car program the new key like put the valet in the ignition and the new key in the door and mash buttons or something. I'm not sure of the technical walkthrough or anything, but I'm pretty sure if you have the valet (which I don't and am therefore screwed), you don't need a vagcom.
You'd still need the key cut, though.
Search the vwvortex. There is more info on specifics on that site than here.

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