"Other than re-installing, is there anyway around this?"
If you can log in as root then you can work your way through the porblem. If you cannot log in as root then you probably will have to reinstall.
If you can log in as root then you can list the user names by ls -l /home
Once you know a user name then you can give the user a password with the passwd command. See:
man passwd
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Be prepared. Create a LifeBoat CD.
http://users.rcn.com/srstites/LifeBo...home.page.html
Steve Stites