This contribution will change the way that the product_info.php displays the product information. It moves the product description into a new tab system and allows for customization of up to 5 tabs. They are customized via the admin page. Customization in this case refers to renaming them.
When editing or adding new product the tabs are displayed there and if you put something in the tab when adding the product, it will reflect the changes on the store side. So if a tab is left blank, it will not show for the customer.
Support Link: http://forums.oscommerce.com/topic/388811-contribution-product-tabs/