Grub2

kali linux in grub2

Store iso on standard partition.

menuentry "Kali Linux" {
   iso="/iso/kali-linux-1.0.8-amd64.iso"
   bootoptions="findiso=$iso boot=live noconfig=sudo username=root hostname=kali quiet splash"
   search --set -f $iso
   loopback loop $iso
   linux (loop)/live/vmlinuz $bootoptions
   initrd (loop)/live/initrd.img
}