[Zope] How to use folders in ZClasses

In a ZClass, if I deploy image1_gif, image2_gif, they can be reached from an instance or ZClass method like this: <dtml-var image1_gif> That's fine, but I have many many images and I don't want to deploy them in the ZClass except collected into a folder called "EditImages". So if I, in the ZClass, have a folder called "EditImages" that contains image1_gif, image2_gif, ... imageN.gif then I would expect to be able to use: <dtml-with EditImages> <dtml-var images1_gif> </dtml-with> ...but this does NOT work. I get instead: Unauthorized You are not authorized to access EditImages. So, how to use folders correctly inside a ZClass?? Regards, Peter