Installing 3th operating system

[Grandpa]

I have installed on my HD Win 7, and PCLos 2010.  If I were to install say pclos 2009.2.  How would I set up Grub so I could boot either one?  Which Grub would I use the one already installed when I did 2010 or the one on the 2009,2 live c-d?  I am thinking I would need to use the live c-d and redo Grub,  But would it matter which one I used?  If this should be posted some place else, please move it.  Thanks.

[Old-Polack]

I have installed on my HD Win 7, and PCLos 2010.  If I were to install say pclos 2009.2.  How would I set up Grub so I could boot either one?  Which Grub would I use the one already installed when I did 2010 or the one on the 2009,2 live c-d?  I am thinking I would need to use the live c-d and redo Grub,  But would it matter which one I used?  If this should be posted some place else, please move it.  Thanks.

I would do the installation, then install grub to the new / partition. You could then copy the first menu.lst stanza from the new installation to your existing menu.lst, or use a chainloader stanza. Change the title line to reflect the actual OS, for easy selection from the boot menu.

Example:

Code: [Select]

title TR5
kernel (hd0,0)/vmlinuz BOOT_IMAGE=TR5 root=LABEL=TR5 acpi=on resume=LABEL=swap1000 splash=verbose vga=791
initrd (hd0,0)/initrd.img

title TR5 no image
kernel (hd0,0)/vmlinuz root=LABEL=TR5 acpi=on resume=LABEL=swap1000 splash=verbose vga=791
initrd (hd0,0)/initrd.img

title TR6
root (hd0,6)
chainloader +1

title MiniMe 2010 BP
kernel (hd0,0)/minime2010/vmlinuz BOOT_IMAGE=MiniMe_2010 root=LABEL=minime2010 resume=LABEL=swap1000 vga=791
initrd (hd0,0)/minime2010/initrd.img

title MiniMe 2010
kernel (hd0,13)/boot/vmlinuz BOOT_IMAGE=MiniMe_2010 root=LABEL=minime2010 resume=LABEL=swap1000 vga=791
initrd (hd0,13)/boot/initrd.img

title MMBuild
root (hd0,8)
chainloader +1

title 2009 pre
root (hd0,7)
chainloader +1


[Grandpa]

Thanks for your reply old-polack!!