BuddyPress.org

Do not use Servers such as Bluehost or Hostmonster to help install BuddyPress. It fails terribly. Do it manually by uploading WordPress MU into your server. Create a database by using MySQL Database, usually provided by the servers. Use the database to create a wp-config file for WordPress MU. They will guide you into installing WordPress MU. After, just use WordPress MU to find for BuddyPress. It will work. Remember to move the themes from the plugin folder to the theme folders (bphome).