I tried a few times to make this go and never had too much luck with it. I decided to give it another stab, and now it works.
Easy way to do this is;
1) Add a DNS entry for 'lists.yourdomain.com' with your DNS provider.
2) Add 'lists.yourdomain.com' as a Virtual Domain using the server-manager.
Untar the package with;
# tar -xvf mailman.tar
Install with;
# rpm -Uvh *.rpm
Update the mailman site password with;
# /opt/mailman/bin/mmsitepass
Fire it up with;
http://lists.yourdomain.com/mailmanAccess the main "mailman" list;
http://lists.yourdomain.com/mailman/admin/mailmanTarball Package contains;
e-smith-mailman-1.0-7.noarch.rpm
htdig-3.1.6-6.i386.rpm
mailman-2.1.3-1.i386.rpm
mhonarc-2.6.8-1.noarch.rpm