Newbie redhat enterprise

OK i have read all the articles and forums. But i have not found anything on how to install with RH 9 enterprise. During the installation of RH I cannot fidn all the packages. Should I post this message on linux forum. I want to install asterisk stable version on RH 9 enterprise.

Also I have 2 nics on my PC. One for the internet and one for the LAN is that OK? Apreciate the help. I have been doing my reading but its so much and want to get going already.