[Zope] Anon. ftp?

Hi, How does one configure Zope to allow anonymous ftp to certain directories? I tried connecting as anonymous, but I could not access anything. I notice, though, that zope.org makes products available for downloading via http. It seems like http could replace anon ftp except that ftp has a reputation for being more error-free for large downloads. Anyone have an opinion here? - Robb