What I'd like to do is to systematically delete all the old members who never show face and leave the selected few. Is it possible to do this then back up whatever (which ones?) tables in the database, reinstall the forum and then import the table data containing the members I want to save? I just need their usernames, passwords and any other data that is associated with their accounts so they can login and start posting again. If this is possible what tables should be saved?