Louis will probably be trying to install Win2k on Su-Lin's comp. Unfortunately this means that Louis will not be able to use the Files and Settings Transfer Wizard in XP, which is a pity.
Regardless, Louis still remembers how to back up e-mail folders and the like manually, and he will remember to export Su-Lin's address book properly. Other than that, most of this will be taken up with installing Win2k itself and whatever apps Su-Lin might need. Should probably make a back up of the Win2k CD for her. We'll see.