Ok, I have been working (for quite a while) on an install guide for PostFix (with DoveCot, SquirrelMail, MailScanner, ClamAV) on CentOS-4.
A full install is part 1 (Postfix / Dovecot / Cyrus-Sasl), Part 3 (SquirrelMail) and Part 4 (MailScanner, Spam Assassin, ClamAV).
I am still working on Part 2 (Postfix / Cyrus-Imap / Cyrus-Sasl). It will go with Part 3 and Part 4 (same as above) to get a full install that includes Cyrus-Imapd instead of dovecot ... should be done with this one in the next couple days.
So to reiterate, Part 1,3,4 is a full postfix/dovecot install ... it is done and ready to go. Parts 2,3,4 is a full postfix/cyrus-imapd install ... this one is not quite done yet.
Part 1 is here: http://www.hughesjr.com/content/view/40/2/Site_News
Thanks Johnny Hughes