Booting Ubuntu and freebsd side by side

[User Wojtek]

> How can I boot Ubuntu12.4  do with FreeBSD9 ?
> when I using boot0 , Linux  was shown, but would not start without a message!
> Where is the problem?
>
> can launch freebsd with Ubuntu GRUB?
> How?

install ubuntu (or whatever) on one MBR partition, FreeBSD on another then 
install partition selector with

boot0cfg -B /dev/yourdisk

and select F1...F4 at boot.
that simple