[Zope-dev] how to get the icon of a product

Hi I try to get the icons of the installed products I try to get it with the self.all_meta_types()/instance/icon My better result is something like: misc_/Audio/mp3.gif with these path I can use: self.unrestrictedTraverse(icon) where icon is the path above (misc_/Audio/mp3.gif) With these approach some icons are correct other are not found is there any good way to get these info? Thanks a lot!!