Someone

boot=/dev/hda1
map=/boot/map
install=/boot/boot.b
lba32
image=/boot/vmlinuz
 label=System
 root=dev/hda2
 read-only


=== add this to grub.conf...
title RouterOS
        root (hd0,1)
        kernel (hd0,0)/vmlinuz ro root=/dev/hda2