GNU/Hurd
--------
Since GNU/Hurd is Multiboot-compliant, it is easy to boot it; there
is nothing special about it. But do not forget that you have to specify
a root partition to the kernel.
1. Set GRUB's root device to the same drive as GNU/Hurd's. Probably
the command `find /boot/gnumach' or similar can help you (Note:find).
2. Load the kernel and the module, like this:
grub> kernel /boot/gnumach root=hd0s1
grub> module /boot/serverboot
3. Run the command `boot' (Note:boot).