ALERT! Site not functioning properly just now, as there was a security hole in Zenphoto, and patching it only ever ruins it! Zenphoto appears to be a bloated, ill-maintained php gallery. We've not had good experiences with it. Other webmasters have done, however, so I won't malign it wholesale. Let's just say I will never use it again. Because of its vulnerability, our hosted account was down for two days (three domains at least!). Last time we patched Zenphoto on the initial domain that was using it for its gallery, it blew it to bits.