What would be the general steps for this kind of upgrade migration?.... I have a fully-functioning ZCS Ver. 4.0.3 OpenSource installation running under Fedora Core 4. The end goal is to migrate this installation to the Network Edition running under RedHat. How do I get there? Do I need to first install OpenSource on Redhat? And how do I move the "/opt/zimbra" files, and at what stage? Most everything is running smoothly now, and I don't want to risk damaging any files or synchronization. I have full backups, but don't know the steps for a proper file restoration. Any help is welcome.