Reinstall solaris grub menu

ohhh no !!!!! my fedora update killed my solaris grub menu !! I have a multiboot system where I was using fedora's grub . Yestarday , I applied "yum -y update" to update my system . But, after that I was facing a strange problem. After switching on my laptop when I select solaris and press the return key it was showing me something like :

Solaris XDE 9/07
rootnoverify (hd0,1)
chainloader =1
GRUB

and after a moment boot prompt was coming again ,i.e solaris grub menu was not coming up.

Anyway, before fedora update , /etc/grub.conf was looking like :

#boot=/dev/sda
default=0
timeout=15
splashimage=(hd0,4)/grub/splash.xpm.gz
hiddenmenu
title Fedora 7 (2.6.21-1.3194.fc7)
root (hd0,4)
kernel /vmlinuz-2.6.21-1.3194.fc7 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.21-1.3194.fc7.img
title Solaris XDE 9/07
rootnoverify (hd0,1)

chainloader +1

title Windows XP SP3
rootnoverify (hd0,0)
chainloader +1

after fedora update it became :

#boot=/dev/sda
default=0
timeout=15
splashimage=(hd0,4)/grub/splash.xpm.gz
hiddenmenu
title Fedora (2.6.23.15-80.fc7)
root (hd0,4)
kernel /vmlinuz-2.6.23.15-80.fc7 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.23.15-80.fc7.img
title Fedora 7 (2.6.21-1.3194.fc7)
root (hd0,4)
kernel /vmlinuz-2.6.21-1.3194.fc7 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.21-1.3194.fc7.img
title Solaris XDE 9/07
rootnoverify (hd0,1)
chainloader +1
title Windows XP SP3
rootnoverify (hd0,0)
chainloader +1

I couldn't get how fedora update can affect solaris grub menu , anyway I decided to reinstall solaris grub. To do so , I insert my installation dvd , restart my system and choose single user shell during sxde installation.
I mount my system in /a and execute the following command :

/sbin/installgrub -m /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c0d0s0

(in your system it maybe /dev/rdsk/c1d0s0).

In this way , solaris grub recovered .I just added the following lines in solaris /boot/grub/menu.lst to boot linux from solaris grub menu :

title Fedora (2.6.23.15-80.fc7)
root (hd0,4)
kernel /vmlinuz-2.6.23.15-80.fc7 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.23.15-80.fc7.img

click here to check out my discussion with jlliagre in http://www.linuxquestions.org/.

Update :: This method is also applicable for SXDE 1/08 grub menu reinstallation.