[CentOS] CentOS 3.4 to CentOS 4

I have upgraded to CentOS 4 from 3.4. I am having trouble figuring out the mail changes. Under 3.4, Imap and POP were modules that xinetd controlled. Under 4.0, I have a choice of either Cyrus-Imapd or Dovecot. After googling all week, I was about to get my user account authenticated under Cyrus and the saslpasswd program, as well as dovecot. My problem is that they don't know where my mail is. I run postfix, and have mail delivered to /var/spool/mail/%u. I put this into Cyrus' mail directory but it still doesn't see anything. Dovecot always tries to chdir to the user's home directory, ignoring anything I put into dovecot.conf concerning mail locations.

Any ideas? Thanks.