[shan]

the menus and the center box's have a template wrapped round them

the menus ues - menu.tpl
the center box's use - dialog.tpl

edit those and your good to go

if you want to change just one instance then make a new wrapper and edit the code that calls it at the bottom of the item

eg

{ include file="menu.tpl" dingbats="dingbats_authentification.gif" menu_title=$lng.lbl_authentication menu_content=$smarty.capture.menu }