I don't have any install contrib help. I have only installed the Internet Jukebox RPM which had a great how-to.
I use MyPhpNuke which is a little different than Nuke, easier to install, uses an install script. Navigate to
www.myphpnuke.com and download the latest release.
phpMyAdmin is very easy to install in the non e-smith RPM version. MyPhpNuke site may have a copy there also.
For any questions about mySql concerning the command line and e-smith, search the forums for posts by Dan Brown. His advice concerning mySql and e-smith have been consistantly correct. Some of the others are not so reliable.