[Zope] CMS Publishing

Hi, In some CMS we have different environment for Development (Authoring), Staging and Production. The CMS Database that resides in the Development setup is usually more bulky than the database in the production and staging site. Can any body tell me how Zope fits into this situation, is there any component that takes care of this? My major concern is that, it might be that my repository contains huge number of images but actually the site uses only some of them. So when actually deploying a site, the system should resolve those images and put the required files. Thanks Sameer Maggon