The process would be the same as I advised you before (post 1083). Add headings to whatever product(s) you want just below your new buttons. If you want all the buttons in a group, try this:
PHP Code:
define ('CAT_BOX_HEADING_9','0|0|||<a href="index.php?main_page=page&amp;id=5">Design</a>|3|<a href="index.php?main_page=page&amp;id=6">Print</a>|3|<a href="index.php?main_page=page&amp;id=75">Web</a>|3'); 
Change the 9 to your category id.
Change the 5/6/7 to your ez-page ids.
Make or edit a stylesheet rule for
.catBoxHeading3 {}
with whatever styling you want for those links. This could include a background image of a button.
If you want graphical buttons with fancy text, that is possible. It would require some extra code in the define.