Grub with2 disks. How to install on the 2 disks?

[Jean Maupertuis]

I have 2 disks one IDE with Windows XP one SATA (not raid) with Fedora 
core3.
Grub is installed  on the mbr of the IDE disk (windows XP).
The problem is that i want to use grub to boot fedora  even if the IDE 
disk become unavailable.
How to do that?  With a grub on the mbr of the  Sata drive  but with 
what in the grub.conf?
With a diskette but one more times  with what in the grub.conf?
Here my actual grub.conf
default=0
timeout=5
splashimage=(hd1,0)/boot/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.9-1.667)
root (hd1,0)
kernel /boot/vmlinuz-2.6.9-1.667 ro root=LABEL=/1 rhgb quiet
initrd /boot/initrd-2.6.9-1.667.img
title Windows XP
rootnoverify (hd0,0)
chainloader +1

Thanks in advance.