How to install Windows Boot loader

[Beta Waves]

Hi guys,
I am having Windows XP, Vista Ultimate and Ubuntu 7.10 on my comp.. In my grub boot loader menu it shows Windows XP and linux when i select XP i will get one more menu asking whether to go for XP or Vista..... My question is say if my XP installation gets corrupted and if i re-install XP ... It will overwrite my Grub loader, so i cant boot into other OS .... Now if i re-install grub ... it identifies only XP and not vista .. so is there a way to install a windows boot loader from vista DVD and then install grub ... so that when i select windows in grub menu ... i should get one more menu asking whether to go for XP or Vista ??

[Amir.php]

You can find help from here:

http://www.novell.com/coolsolutions/tip/19753.html

apcmag.com/how_to_dualboot_vista_with_linux_vista_installed_f irst.htm

ubuntuforums.org/archive/index.php/t-539557.html