[CentOS] Dovecot w/ MySQL support and CentOS

I am converting a Debian box running Postfix, Courier and MySQL to a CentOS box running Postfix, Dovecot and MySQL. I have the Postfix with MySQL support taken care of with the RPM from the centosplus repo. It appears that the stock RPM for Dovecot comes with Postgres, but not MySQL support.

It looks like I need to download the source RPM and then rebuild it with MySQL support. Could someone outline the steps I need to do this or point me to a good resource? I have not worked with source RPMs in the past, but it looks like it is time to learn!

Also, if I build it from a source RPM, should I then exclude it from my repos to keep a future update from overriding the one I built?

Thanks! Jeffrey