freebsd grub

/boot/grub/menu.lst

title FreeBSD 6.0
root (hd0,1,a)
kernel /boot/loader
splashimage=(hd1,1,a)/boot/grub/images/image.xpm.gz
chainloader +1

To install GRUB on the master boot record of your hard drive
use 'grub-install ' command.

NOTE: Don't forget to run 'sysctl kern.geom.debugflags=16'
on 5.x and -CURRENT to enable writing in hard disk
system areas.

For details read the GRUB info page using 'info grub'.