I tried this to boot knoppix-5.1.1 iso image copied to hard disk. Bott process complains that it can't find iso:

title Knoppix from ISO (hdb)
kernel (hd1,6)/KNOPPIX/linux ramdisk=100000 init=/etc/init lang=us apm=power-off nomce quiet fromiso=/KNOPPIX/knoppix.iso noprompt noeject vga=0x317
initrd (hd1,6)/KNOPPIX/minirt.gz
boot

any pointers will be appreciated.

-ishwar