Want to add and manage custom database tables from the admin area? This plugin contains several easily modified examples.
Choose which of the plugins you wish to use and upload its folder to the plugins folder on your wordpress installation and then Activate it. You should see a new menu item with the name of the plugin just under the Comments entry. If you choose to download the entire plugin and install it using the plugins Add New function, when you click activate now the plugin seems to fail. However simply reload the installed plugins page and activate the plugin from there. It works fine... I will try to fix this in due course.