一：在CentOS.ks的定制脚本中，删除syslinux组件：出错提示：
/usr/lib/python2.6/site-packages/imgcreate/errors.py:45: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6 return unicode(self.message)
Error creating Live CD : syslinux not installed : no suitable *menu.c32 found
xamining /var/tmp/yum-root-xd1ddq/epel-release-6-8.noarch.rpm: epel-release-6-8.noarch
/var/tmp/yum-root-xd1ddq/epel-release-6-8.noarch.rpm: does not update installed package.
二：在CentOS.ks的定制脚本中，使用selinux --disable,错误提示：
Error creating Live CD : Unable to disable SELinux because the installed package set did not include the file /usr/sbin/lokkit
解决方案：
1. "selinux --disabled" in kickstart
2. 确保 @admin-tools or system-config-firewall 在安装包之列
总结：selinux --disabled requires system-config-firewall-base in ks