[Dovecot] Looking for HowTo Postifx, Dovecot and PostgreSQL

Hi folks,

I know it's a bit a n00bish question, but I'm a little confused about this many different ways on setting up dovecot with postfix and using a PostgreSQL backend for virtual hosts. I've found this one quiet helpful: http://wiki2.dovecot.org/HowTo/DovecotPostgresql even it seems to be little outdated for recent versions of dovecot (the auth part of dovecot.conf). Also its lagging some inforamtions I wasn't able to find on my own (e.g. how to set password for a imap account).

Can somebody give me a hint for a up-2-date howto for some noob as I am?

Cheers, Frank