Mine appears to be working fine with the following Grub4Dos config:
# --- Helix 3 2009 R1 ---
title Helix 3 2009 R1
map /boot/helix/Helix2009R1.iso (0xff)
map --hook
root (0xff)
kernel /casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper iso-scan/filename=/boot/helix/Helix2009R1.iso splash locale=en.UTF-8 --
initrd /casper/initrd.gz