Aha! that's the right answer for several other design problems I have been pondering recently. I can see it being another how-did-we-ever-cope-without-it tool. -----Original Message----- Through the web products already zip up database objects, including ZClasses, and code for you when you create an object distribution. Currently, the data gets imported into the destination Zope. We are considering having products contain read-only databases that get used directly, rather than getting imported. This would allow some interesting optimizations and would almost certainly be easier to integrate.