NT User id Renaming and Profile Carryove

I have a WinNT PDC. I would like to rename every profile
to fit a new naming convention. Users are running
Win2000. When I change the profile name this would cause everyone to login under the new profile thus losing their personal settings untilthey are transfered over. In a large enviornment of over 100 users I would have to go to everydesk to move thier personal setting over and resetup
thier email in Outlook, not something I look forward to.
My question is: Is there a utility that could rename all these profiles and not lose thier personal settings??
Thanks for the help.

James McGinley