[Dovecot] Help with Virtual user setup.. need pointers

I have been reading this :

http://wiki.dovecot.org/moin.cgi/DovecotPostgresql

I decide to use the postgresql instead of mysql.. but now i am in problem..

I cant seem to get postfix-pgsql sasl2-bin libsasl2-modules libpam-pgsql rpms or files for the fedora core 4..

Is there anyone who is using Fedora Core 4.. and have dovecot.. with postifx running virtual users ...

or is there another way besides the link ontop to do this ?

Andre Bunting Information Technology Manager Integrated Telecommunication Consultants Limited Unit No.1 - Ground Floor, 23 -27 Eastern Main Road, Barataria, Trinidad, West Indies. Telephone : 675-1438 Cell: 748-8587