Chris: Sorry about the HTML email *blush*! Here's the arrangement I have now: my Zope 2.6.1 is running as before, on all network interfaces. So is Apache, so from the outside it looks like nothing is different and it works as well as always (not that *that's* a lot, but I'm not downhill anyway!) Zope 2.7 is running on higher numbered ports but only on the firewalled port. Apache can see it, but nobody outside can. Great. I shut down Zope 2.6, copied its ZODB to the new Zope 2.7 instance, and restarted both Zopes. There's all my stuff in the new environment, but things like database adapters are broken (not surprisingly). Andrea: I agree, it's not easy to get the machinery working. I'm still fairly new in Python and I'm feeling a bit mystified at times. Still, I feel the shortcoming is my lack of understanding and not inherent weakness in the products! I probably will whack my thumb with the hammer a few more times but it'll make sense in the end. Meanwhile, I'm burning CDs for Fedora Linux to try that out. I also tried FreeBSD but thought "more different is better." We shall see! Murray