[CentOS] Setting up postfix under CentOS-6

I recently, perhaps foolishly, changed over a remote server from sendmail/procmail to postfix/amavis/spamassassin/clamd , and I'm finding it difficult to configure this setup.

The CentOS document http://wiki.centos.org/HowTos/postfix explicitly says that its instructions may not work in CentOS-6. Does anyone know of reasonably simple postfix documentation for CentOS-6?

I've been amazed how bad the postfix documentation is. It actually seems to be worse that sendmail documentation, which I thought established a record for this sort of thing. The official documentation at http://www.postfix.org/documentation.html is ludicrously wordy, with every conceivable option listed in random order.