the FreeBSD thread

[Anish]

Install it on VirtualBox..!! That's the best way

Thanq

[Liverpool_fan]

FreeBSD uses its own boot loader, you'll have to make sure not to install it's boot loader and then make either GRUB2 autodetect FreeBSD by grub-mkconfig/update-grub or adding chainloader entries in GRUB/GRUB2 configs. Mind you I messed up my Windows install while installing FreeBSD, but then I "quick-installed" FreeBSD or got careless at some time. Think there's an option for not installing bootloader in sysinstall.
And yeah, Virtualbox is the safest choice.