I don't think you can or need to transfer Skype contacts from one PC to another. All your contacts details are held on the Skype servers and the simple act of re-creating your account on a new PC will automatically download your contacts when you next use the system. At least they did on the three PCs that I've tried it on.
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Do you know that we're all in line for succession to the throne? Really?
Well, if forty-eight million, two hundred thousand, seven hundred and one people died I'd be Queen.