Wibstats is a WordPress plugin that gives each blog in a WordPress, WordPress MU or BuddyPress installation their own visitor statistics.
For standard WordPress:
The plugin should be placed in your /wp-content/plugins/ directory, so it looks like this:
/wp-content/plugins/ /wp-content/plugins/wibstats/ /wp-content/plugins/wibstats/wibstats.php /wp-content/plugins/wibstats/wibstats-includes/
For WordPress MU or BuddyPress:
The plugin should be placed in your /wp-content/mu-plugins/ directory (not /wp-content/plugins/) so it looks like this:
/wp-content/mu-plugins/ /wp-content/mu-plugins/wibstats.php /wp-content/mu-plugins/wibstats-includes/
Wibstats for WordPress MU requires no activation. The database table for each blog should be created automatically.