"is it possible there was a problem with the installation of the rpm?"
You can check to see if mkisofs is on your system with these two commands:
which mkisofs
rpm -qi mkisofs
If you have not tried cdrecord yet you should also try:
which cdrecord
rpm -qi cdrecord
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Be prepared. Create a LifeBoat CD.
http://users.rcn.com/srstites/LifeBo...home.page.html
Steve Stites