Solo cambia el orden y en todo casi yo te quitaria de ahi el kernel -16 ya que tenes el 17 tambien

ejemplo:
title Ubuntu 8.04, kernel 2.6.24-18-generic
root (hd0,3)
kernel /boot/vmlinuz-2.6.24-18-generic root=UUID=d978fc66-e26b-4e15-9a06-6affde2a60cd ro quiet splash
initrd /boot/initrd.img-2.6.24-18-generic
quiet
# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda2
title Microsoft Windows XP Professional SP3
root (hd0,1)
savedefault
makeactive
chainloader +1
# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda5
title Microsoft Windows XP Embedded
root (hd0,4)
savedefault
makeactive
chainloader +1
title Ubuntu 8.04, kernel 2.6.24-18-generic (recovery mode)
root (hd0,3)
kernel /boot/vmlinuz-2.6.24-18-generic root=UUID=d978fc66-e26b-4e15-9a06-6affde2a60cd ro single
initrd /boot/initrd.img-2.6.24-18-generic
title Ubuntu 8.04, kernel 2.6.24-17-generic
root (hd0,3)
kernel /boot/vmlinuz-2.6.24-17-generic root=UUID=d978fc66-e26b-4e15-9a06-6affde2a60cd ro quiet splash
initrd /boot/initrd.img-2.6.24-17-generic
quiet
title Ubuntu 8.04, kernel 2.6.24-17-generic (recovery mode)
root (hd0,3)
kernel /boot/vmlinuz-2.6.24-17-generic root=UUID=d978fc66-e26b-4e15-9a06-6affde2a60cd ro single
initrd /boot/initrd.img-2.6.24-17-generic
title Ubuntu 8.04, kernel 2.6.24-16-generic
root (hd0,3)
kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=d978fc66-e26b-4e15-9a06-6affde2a60cd ro quiet splash
initrd /boot/initrd.img-2.6.24-16-generic
quiet
title Ubuntu 8.04, kernel 2.6.24-16-generic (recovery mode)
root (hd0,3)
kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=d978fc66-e26b-4e15-9a06-6affde2a60cd ro single
initrd /boot/initrd.img-2.6.24-16-generic
title Ubuntu 8.04, memtest86+
root (hd0,3)
kernel /boot/memtest86+.bin
quiet