[CentOS] How to add ClamAV to Postfix?

I was able to get everything working after getting the appropriate
RPM's from "EPEL". I'm new to RH/Centos, so I did not know about that
site.  I tweaked the config based on what I found here:

http://fedorasolved.org/server-solutions/postfix-mail-server

I know this was not really a Centos question, but thanks for you guys
helping me anyway.

thanks!