Re: Install problems
You need a tool like phpMyAdmin to access the database directly so you can drop tables that were created by bbPress. Normally those tables begin with the prefix bb_, but if you changed that on installation your tables will be differently named.
http://www.phpmyadmin.net/home_page/index.php
Make a backup of your database before you drop any tables.
Your host might have something installed already that can access the database directly. It would be listed in your control panel.