sure, keep them in session vars, or just start the db registartion on the first page and then keep filling things in as you go along. that is a nice method, incidentally, because you can ask for the most important stuff on the first page... that way if you lose people on pages 2, 3 or 4 you still have their email address, name or whatever other key data you requested up front.
just don't forget to occasionally cull the dead records from abandoned registrations, if you can't use 'em.
'
best
eric