Chainloading with Grub

When you choose to have en entry for windows in your Boot Manager, grub uses the function chainloader.

This function can be used to boot into another Mandriva Linux, or another Linux or OS, as long as it has his own bootloader installed on its root partition.

You just need an entry like that in your boot/grub/menu.lst:

• title myCooker
• root (hd0,3)
• chainloader +1

Here, I installed a Mandriva Linux version and created an entry that I called myCooker pointing toward the partition hda4 (grub works this way: 0 for a, 1 for b, etc and it counts partition from 0 so the fourth one is (0 1 2) 3 therefore: (hd0,3)

So this means that you can install many Mandriva Linux or other Linuxes with their own bootloaders and have them all as entries in your BootLoader.
You can also have those entries ready, and when you install, reinstall or overwrite a new Linux, if you intall its BootLoader on its root partition instead of the MBR, it will be immediatly available.