Configure amavis to run with postfix

We have a Linux (Scientific Linux SL Release 4.0) Mail Server installation based on postfix, cyrus and MySQL plus postfixadmin for users manager. We need to setup amavisd, with spamassassin and clamav, to this postfix configuration. All software are just installed from RPM (postfix was build from source): # rpm -qa | grep amavis [login to view URL] # rpm -qa | grep spamassassin [login to view URL] # rpm -qa | grep clamav [login to view URL] We need only the integration of amavisd with postfix ([login to view URL] and [login to view URL] files) and some amavisd optimization. The mail server is already working and can not be stopped except for short periods.