WordPress.org

• copy the wp-banner.zip file into the wp-content/plugins/ directory
• extract the wp-banner.zip file
• activate the plugin in the wp-admin menu
• verify if the table is created (e.g. with phpMyAdmin)
• add your first banner (Plugins / Banner Admin)

If you have the banners on your file system, even so you have to add the full URL (http://...) to the banner image. The plugin only works in browsers with activated Javascript