All subsequent steps must be performed as the "root" user on the server. SSH onto the server as "root". You should have either the password or the passphrase from section II to do this. To allow PHPMyAdmin to run correctly remember to turn off SELinux.
As of this writing the latest stable version of PHPMyAdmin is 2.7.0.pl1 Download the source tarball phpMyAdmin-2.7.0-pl1.tar.gz (it can be found at http://sourceforge.net) to the temporary directory /var/tmp.
# cd /var/tmp
# ls -l
-rw-r--r-- 1 root root 3352193 Dec 8 14:31 phpMyAdmin-2.7.0-pl1.tar.gz