[Dovecot] dovecot-config file location on CentOS5 / RHEL5?

[Thomas Harold]

Using the pre-built RPM from ATRPMs. Where does the dovecot-config file 
get generated? Is there a flag in a config file that controls whether it 
gets created?

Installed Packages
Name       : dovecot
Arch       : x86_64
Epoch      : 1
Version    : 2.0.13
Release    : 1_129.el5
Size       : 5.1 M
Repo       : installed
Summary    : Dovecot Secure imap server
URL        : http://www.dovecot.org/
License    : MIT

Do I have to install Dovecot from source in order to also use the 
Pigeonhole plug-in?