You can install whichever distro's grub to the main drive's mbr that you want, using the Ubuntu live cd:
http://ubuntuforums.org/showthread.php?t=224351
You can then add an entry to boot Mandriva:
http://users.bigpond.net.au/hermanzo..._Linux_Systems
If you use chainloading, you need to setup grub on the root partition of the distro you're wanting to boot, e.g.
Code:
root (hd1,0)
setup (hd1,0)
For a configfile entry, I'm not sure if Mandriva uses menu.lst or grub.conf:
configfile (hd1,0)/boot/grub/grub.conf
or
configfile (hd1,0)/boot/grub/menu.lst
Grub doesn't need to be installed to the root partition, if you use configfile method to boot.
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