Displays a Facebook Like Box with nice CSS style options.
Upload the entire facebook-like-box folder to your wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.
Visit http://www.facebook.com/pages/create.php to create a new page in Facebook. Then edit your page and obtain the FanPage URL from the adress bar.
Use this information to call the function inside your template or activate the widget.