Error trying to install MRG Realtime RPM from iso

Solution Verified - Updated -

Issue

I'm having difficulties trying to install my 60 day trial of MRG2.1. The specific ISO file is: rhel-6-mrg-2.1-x86_64.iso.

Here's the error message and setup steps:

rpm --import <a href="http://station.example.com/mount_MRG12/RPM-GPG-KEY-redhat-release" target="_blank" class="make_room_for_kcs">http://station.example.com/mount_MRG12/RPM-GPG-KEY-redhat-release</a>

rpm --import <a href="http://station.example.com/mount_MRG12/RPM-GPG-KEY-redhat-beta" target="_blank" class="make_room_for_kcs">http://station.example.com/mount_MRG12/RPM-GPG-KEY-redhat-beta</a>

yum --enablerepo=mrgcd groupinstall "MRG Realtime"

This is my warning and error message:

Total size: 19 M
Installed size: 88 M
Is this ok [y/N]: y
Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY


Public key for kernel-rt-3.0.25-rt44.57.el6rt.x86_64.rpm is not installed

Environment

Red Hat Enterprise MRG Realtime

2.1

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