Your menu.lst should look exactly like this, you only need to change
the device numbers.
title Debian GNU/Hurd
root (hd0,0)
kernel /boot/gnumach.gz root=device:hd0s1
module /hurd/ext2fs.static --multiboot-command-line=${kernel-command-line} --host-priv-port=${host-port} --device-master-port=${device-port} --exec-server-task=${exec-task} -T typed ${root} $(task-create) $(task-resume)
module /lib/ld.so.1 /hurd/exec $(exec-task=task-create)