There're no probems at all running OSes with grub on multiple hard disks. I have my /boot partition on sda7 (sda is primary HD set in BIOS). I have SUSE on second HD and Gentoo with m$ os on first one.
All you need to do is to run
# grub
> install <insert-your-primary-hard-drive-here>
Here's my menu.lst:
Code:
default 1
timeout 30
splashimage=(hd0,6)/boot/grub/splash.xpm.gz
title=Gentoo
root (hd0,6)
# kernel /boot/kernel-genkernel-x86_64-2.6.15-gentoo-r7 root=/dev/ram0 init=/linuxrc ramdisk=8192 real_root=/dev/sda9 udev vga=791
kernel /boot/kernel root=/dev/ram0 init=/linuxrc ramdisk=8192 real_root=/dev/sda9 udev vga=791
initrd /boot/initramfs-genkernel-x86_64-2.6.15-gentoo-r7
title=SuSE
root (hd1,5)
kernel /boot/vmlinuz root=/dev/hda6 selinux=0 resume=/dev/hda6 vga=791
initrd /boot/initrd
#title KANOTIX
# root (hd6,66)
# kernel /boot/vmlinuz ramdisk_size=100000 init=/etc/init lang=us apm=power-off nomce quiet vga=791
# initrd /boot/miniroot.gz
# boot
title=mustdie
rootnoverify (hd0,0)
makeactive
chainloader +1