Re: [Trisquel-users] Installing Trisquel and gentoo on another drive, grub required?.

[GNUtoo]

Also my Gentoo is very rusty, but still, here are some tips:
-> I guess that you'd better handle grub.cfg inside trisquel, because  
trisquel doesn't expect a static/hand written grub.cfg, and I guess it would  
be easier to make gentoo have that.
-> Else last resort, you make both distro generate their grub.cfg. Then you  
add a menu that loads the other distro's grub.cfg with something like  
"configfile (hd0,msdos1)/boot/grub.cfg" inside the entry. To do that you  
would add what is needed in /etc/grub.d/*custom* (I don't remember which one  
by heart.