[Zope] Zlasses and icons

Hello, I am working on a product that is created by using ZClasses. When I create an object in the ZMI no icon is shown. How can I add an icon to a ZClass that will be shown in the ZMI? If there is already some documentation out there, please point me to it. Thanks in advance! Arjan Huijzer __________________________________________________ Do you Yahoo!? Yahoo! Shopping - Send Flowers for Valentine's Day http://shopping.yahoo.com