This instruction is specific to grub-legacy(grub) not grub-pc(grub2).
OP requested grub-legacy help.
I would appreciate a bit of help with grub (not grub2) on fake raid. I can boot into the above installation about half of the time, but sometimes end up at the initramfs prompt.
In my case even if i try to install grub-pc after installation(64bit), it will give memory leak error, thats why grub-legacy comes in picture. so to remove grub-pc and install grub-legacy, which goes smoothly without error.