title <other OS>
root (hd0,n)
chainloader +1
as for me these lines wont chainload to that grub2 loader

well the workaround is to add
kernel /boot/grub/core.img to the boot stanza so it'll looks like this
title xxx
root (hd0,??)
kernel /boot/grub/core.img
chainloader (hd0,??)+1 ---->>does this additon really makes any differents??
i prefer grub1 to handle things
