To use the Red Hat packages, all you have to do is:
# /etc/init.d/postgresql start
[this will initialize the database for you]
# chkconfig postgresql on
[this will make sure it comes up at the next reboot]
# su - postgres
$ psql template1
> ...
-Doug
--
Let us cross over the river, and rest under the shade of the trees.
--T. J. Jackson, 1863