Editing isolinux leads to kernel panic error in Centos Live CD

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http://unix.stackexchange.com – I downloaded a CentOS Live CD and tried to customize features on it. The CD boots fine if I use it "as-is". If I edit "isolinux.cfg" to edit the change the title of the CD or the automatic boot time, I get the following error: Kernel panic - not syncing: Attempted to kill init! Pid: 1, comm: init Tainted: G W --------- 2.6.32-279.el6.x86_64 #1 Call Trace: ... ... Is there a file integrity check that runs before boot that is causing the error? The same does not happen with a Fedora Live CD. (HowTos)