Solaris X86 grub boot menu

I have a x4200 m2 that I've installed Solaris 10 on. I've created a raid 1 mirror using disk0 and disk1. I'm trying to add the mirror bootblk to the grub menu so in case of a failure of disk0, I can simply boot from the mirrored disk1. I'm looking for the syntax to add the alternate boot path to the grub menu. Do I use bootadm? Installgrub? The menu.lst file says not to edit it manually... I'm stumped.
Thanks!

ypu must add chainloader at /boot/grub/menu.lst

I've seen a few examples of different OS's and even two different versions of Solaris on the menu.lst file but no examples of how to modify the file. I did a google on chainloader and I'm still not seeing any syntax that makes any sense. How do I add chainloader to the menu file and what is it's purpose?

How did you create RAID 1 Array ? Did you use SVM or Hardware RAID ?

put here what do you have in your menu.lst

 vi /boot/grub/menu.lst     

or

 vi /rpool/grub/menu.lst

What wasn't making any sense ? Post the entries you have trouble understanding.

The purpose is to launch another boot loader that would be located on a different disk and/or primary partition.