The problem you might find is that... if you associate the ipod with another computer. It wouldn't (i believe) do an auto sync with yours after that, it would be linked to the other.
Anybody else.. go any ideas...
If it were me... in my mac-ness I would start the old one in target disk mode connect with firewire and use the computer with 2.0 to run the old system only with the faster bus. But alas I don't think you got anything like that for windows?