RPMs exist for both Fedora and RHEL (through EPEL). If your repositories are configured correctly you should simply be able to yum install koan
. Koan doesn't have many dependencies so if you don't feel like adding the EPEL repo to your RHEL machine you can simply install the RPM.
Once installed you should test your installation against a cobbler server.
koan -s genome-repo.usersys.redhat.com --list=profiles koan -s genome-repo.usersys.redhat.com --list=systems