[Zope] moving users

I need to move all the users in an acl_users folder at a point in my folder structure into the acl_users folder further up, while still preserving the users there. How can I do this? There doesn't seem to be a way to cut and paste users between folders in the ZMI, so I'll have to write a script to do this. Looking at the userFolder API, I would have to read all the users in the source folder with getUsers(), then use userFolderAddUser with all the parameters to create the users in the destination folder. But I would need access to the password in order to create the users, which the user object doesn't give me. Can anyone think of a way to do this? TIA