Grub and MBR

[pinr]

I'm having a big problem with grub. My SATA drive is partitioned as follows:
sda1 Spare (used for testing OSes)
sda2 Boot
sda3 Swap
sda4 root
I recenctly installed Win XP on sda1, I'm no fan of windows but I needed it to install some firmware on an MP3 player I have. Of course it overwrote grub on the MBR. No problem I thought I'll just boot up from the live CD chroot into my genoo install and run grub-install. The problem is that when I do that grub-install gives me the following message:
could not find device for /boot: not found or not a block device. I know that the grub conf is ok. I have read the forums and tried the following all to no avial.
mount -t proc none /mnt/gentoo/proc
mount -t ext2 /dev/sda2 /mnt/gentoo/boot
mount -o bind /dev /mnt/gentoo/dev
This is really bugging me as I only recently changed to grub from LILO due to Lilo being masked for AMD 64 which I now have. Lilo was so simple to use.

[d_m]

If you post your grub.conf file, and then the exact command you run and its full output, it will make it easier to help you.
_________________
The name that can be named is not the eternal name.

[pinr]

I installed Ubuntu on sda1 and Ubuntu automacally detected Gentoo and installed Grub. This does not solve my problem, however as I still need be able to install windows on that partion. The command I'm using is this:
grub-install --no-floppy /dev/sda
Now this works fine when I boot into Gentoo. However when I try by chrooting into Gentoo from the live cd
I get
could not find device for /boot: Not found or not a block device
My grub.conf is:
#
# Sample boot menu configuration file
#

# Boot automatically after 30 secs.
timeout 10

# By default, boot the first entry.
default 0

# Fallback to the second entry.
fallback 1

# For booting GNU/Hurd
title GNU/Hurd
#root (hd0,0)
#kernel /boot/gnumach.gz root=hd0s1
#module /boot/serverboot.gz

# For booting GNU/Linux
title 2.6.11
root (hd0,1)
kernel /2.6.11-gentoo-r7 root=/dev/sda4
#initrd /initrd.img

title 2.6.10
root (hd0,1)
kernel /2.6.10 root=/dev/sda4

title Kubuntu
root (hd0,0)
kernel /vmlinuz-2.6.10-5-amd64-generic /root=/dev/sda1

# For booting Mach (getting kernel from floppy)
#title Utah Mach4 multiboot
#root (hd0,2)
#pause Insert the diskette now!!
#kernel (fd0)/boot/kernel root=hd0s3
#module (fd0)/boot/bootstrap

# For booting FreeBSD or GNU/KFreeBSD
#title FreeBSD / GNU/KFreeBSD
#root (hd0,2,a)
#kernel /boot/loader

# For booting NetBSD or GNU/KNetBSD
#title NetBSD / GNU/KNetBSD
#root (hd0,2,a)
#kernel --type=netbsd /netbsd

# For booting OpenBSD
#title OpenBSD
#root (hd0,2,a)
#kernel --type=netbsd /bsd

# For booting OS/2
#title OS/2
#root (hd0,1)
#makeactive
# chainload OS/2 bootloader from the first sector
#chainloader +1
# This is similar to "chainload", but loads a specific file
#chainloader /boot/chain.os2

# For booting Windows NT or Windows95
#title Windows XP
#rootnoverify (hd0,0)
#makeactive
#chainloader +1
# For loading DOS if Windows NT is installed
# chainload /bootsect.dos

# For installing GRUB into the hard disk
title Install GRUB into the hard disk
#root (hd0,0)
#setup (hd0)

# Change the colors.
#title Change the colors
#color light-green/brown blink-red/blue