I'd like to set up a zimbra server with a mixed installation: Zimbra Open Edition + Zimbra Network Edition in order to release to my clients a service rather than another according to their needs.

I attended a Zimbra webinair in which they spelled out this configuration but I can't find a guide to do that as clean as possibile.

Can you help me with this?

Another question, is it possible to configure different type of mail address (open / net) under the same domain?

Than you in advance.