In follow-up to my last post, which itself was a commentary on an earlier topic, I have the additional steps you need to do the previous procude (which is to edit /opt/opsware/boot/tftpboot/pxelinux.cfg/default):

/etc/init.d/opsware-sas stop smartboot

Edit file.

/etc/init.d/opsware-sas start smartboot