Guide for postfix + amavisd-new + spamassassin + postgrey ... on postgresql?

I'm going to setup a mailfiltering gateway for my company use. After
some careful considerations, I decided to use PostgreSQL instead of
MySQL. Unfortunately, the only available mailfiltering gateway guide I
can find uses MySQL
[http://www.gentoo.org/doc/en/mailfilter-guide.xml].

In addition, I also don't need ClamAV. Just postfix + amavisd-new +
spamassassin + postgrey. With a PostgreSQL back-end.

Can someone point me to resources to implement the mailfiltering gateway?

Resources I have found up to now:
* http://www.ijs.si/software/amavisd/README.sql.txt
* http://www.ijs.si/software/amavisd/README.sql-pg.txt
* http://www.tuxj0b.de/HOWTO_Mailserver_mit_Postfix_Dovecot_Antispam_und_PostgreSQL_Backend
(I'll need to translate this first; it's in German)
* http://www.lxtreme.nl/index.pl/docs/linux/dovecot_postfix_pam (but
I'll ignore the Dovecot parts)
* http://en.gentoo-wiki.com/wiki/Complete_Virtual_Mail_Server/White_and_Black_Lists

Any other good resources?

Plus, any gotchas I should be aware of?

Rgds,
-- 
FdS Pandu E Poluan
~ IT Optimizer ~

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