As of this writing, the current RHEL release (4) is only available on CDs, not DVD. It is possible to create a bootable DVD ISO from these CDs using Chris Kloiber's mkdvdiso.sh script. 1. Download mkdvdiso.sh. http://mirror.centos.org/centos/build/mkdvdiso.sh 2. Install the anaconda-runtime prerequisite package and its dependencies. # rpm -q anaconda-runtime || yum -y install anaconda-runtime