Installing Grub 2 on pc-bsd 8.0

[krax]

hi
I want to replace the grub2 wth pc-bsd bootloader. what shoul i do and how to config it.
my partion table is;

/dev/label/rootfs1 on / (ufs, local, noatime, soft-updates)
devfs on /dev (devfs, local, multilabel)
/dev/label/var1 on /var (ufs, local, noatime, soft-updates)
/dev/label/usr1 on /usr (ufs, local, noatime, soft-updates)
procfs on /proc (procfs, local)
linprocfs on /compat/linux/proc (linprocfs, local)
tmpfs on /tmp (tmpfs, local)
/tmp on /usr/jails/portjail/tmp (nullfs, local)
/media on /usr/jails/portjail/media (nullfs, local)
/usr/home on /usr/jails/portjail/usr/home (nullfs, local)
devfs on /usr/jails/portjail/dev (devfs, local, multilabel)
procfs on /usr/jails/portjail/proc (procfs, local)
/dev/fuse0 on /media/FreeAgent (fusefs, local, synchronous)

tnax help me plz .