Boot ISO from Grub

[gregrwm]

while we wait, i wonder if it might be possible to boot from harddisc using a trick i've used with *ubuntu alternate CDs:
after "Unable to find a medium containing a live file system", enter these commands (adjust "sdb1" and "boot" to suit):

mkdir            /drive
mount  /dev/sdb1 /drive
mv      /dev/sr0 /dev/sr0-
ln -s /drive/boot/linux-lite-2.2-32bit.iso /dev/sr0

but then, is there a way to tell initramfs to try again?