winXP+RedHat9+Grub=can'tUpgradeWindows

[firstlastcase]

hi all
i have 2 operating systems on my pc
the first is linux redhat 9 and the other is windows xp sp2
the boot loader is Grub (from linux)
everything was just fine
untill i had a problem with my windows xp
i needed to format it and to reinstall it
but i cant because the boot loader is Grub
and each time i try to boot from windows cd .. it does that successfully but after a while ... the pc just turns off
my proposed explanation is that maybe when the windows cd tries to add entries to the boot loader in the installation process it fails because it is not windows based ..

any help is appreciated

thanks

[devils casper]

You have to remove GRUB first. Download SuperGRUB CD and boot from it. Select 'Fix Windows Boot Loader' from Menu. Windows Installation CD will work after that.
You have to re-install GRUB after Windows Installation to boot up Linux. Boot up from SuperGRUB CD again and Select 'Fix GNU/Linux Boot Loader ( GRUB )' from Menu.