Moving Profiles after upgrade

We recently upgraded to Active Directory by installing NT4 as a BDC on a new server then promoting to PDC then upgrading to win2k and AD. All of our users profiles are still being stored on our old PDC (now a DC in the same domain). We want to ditch our old PDC completely. What is the easiest way to copy those profiles from the old machine to the new DC and make the appropriate profile path change in AD? Aren’t there some scripts or little apps that do this automatically?