OsCommerce Buttons

Hello, I need to have some buttons installed on my OsCommerce site. All of the buttons, except the "About Us" button, should lead to pages, where certain categories will be displayed. For example, if the "Chains" button is clicked, it should take you to a page where only the Chains categories will show. On the Admin panel, I should have the ability to assign categories to each button. Regarding the "About Us" button, it should point to a blank page, where I need to put some text about my site. I can format it using HTML.