Easy Transfer Prob: Changing Old computer to New computer

>I successfully transferred files from an old XP computer to a new Vista
> computer using easy transfer. Now I am trying to transfer files from an
> even
> older XP computer to the old XP computer I used in the first transfer;
> i.e.,
> that XP computer was the source of the files in the first transfer (the
> Old
> computer), but will be receiving the files in the new transfer, making it
> now
> the New computer. My problem is that when I run E.T. it remembers the
> computer as the Old computer, and only offers to transfer files off of it.
> Is
> there some way to change something so that E.T. realizes it is now the New
> computer?
>
> Thanks!