label centos51x8664
 	MENU LABEL CentOS 5.1 x86_64
 	KERNEL /pxeknife/installers/centos/5.1/x86_64/vmlinuz 
 	APPEND reiserfs jfs xfs btrfs initrd=/pxeknife/installers/centos/5.1/x86_64/initrd.img method=http://archive.kernel.org/centos-vault//5.1/os/x86_64/ ip=dhcp