export Usenet via IMAP

I'm interested in this capability:

     Cyrus has the ability to export Usenet via IMAP and/or export 
shared IMAP mailboxes via NNTP. This is made possible by a new NNTP 
daemon which is included with Cyrus.

http://cyrusimap.web.cmu.edu/docs/cyrus-imapd/2.4.9/install-netnews.php

However, I have a working usenet and e-mail system which I don't want to 
bork.  I'm familiar with leafnode and want to leave that in place for 
the time being.  Also, I'm using a dovecot-postfix stack which Ubuntu 
provides.

Firstly, I would like to add cyrus to the mix without upsetting those 
other components.  Is that feasible?

Secondly, use cyrus to read a few select NNTP newsgroups from leafnode 
on localhost.  This probably is not terribly hard.

Finally, I would use cyrus to export to IMAP (No POP3?).

Before I start using Cyrus, about how difficult is this?  Are there 
alternatives?  I'm only missing the export component.

thanks,

Thufir
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