Public Folder management in Exchange 2007

I have an issue where I need to remove and reset all the public folder permissions. The person who originally created the permission on the public folders used user names instead of groups. This has left me with tons of NT Users: UID's, not to mention a complete mess of user names.
What I was looking to do is use Remove-PublicFolderClientPermission, but instead of using this on a single PF, I would to run it on the root level PF and do a recursive change through all the PF's, and instead of selecting 1 user I would like to remove all users.
I have been able to modify, remove and add user permissions on a single user folder level but I have not been able to locate an answer to this question.
Can you use wildcards? or, Is there a way to reset the entire public folder store.
To go through this manually would take days.

Thanks for any and all help.