David W. Deeds has created a much needed guide to setting up OpenSimulator in your school. It's more than a step-by-step, including some discussion of the reasons for using virtual worlds in education. Here is the Scribd version (cool, that worked), or you can download a copy from his website. I've only just skimmed it but it looks great, explaining many of the complications one encounters in configuration and setup, as well as covering the options pretty well. IMHO the Diva setup could have been promoted more heavily as I think it's more user-friendly than the main release, since it includes documentation and update utilities. But it also uses MySQL as a default for storage rather than SQLite and he may have thought setting up a db would pose too great a challenge for the average user. Great service he's done, putting this together!
OpenSimulator: School Quick Start Guide