Versions 9 and 10 of FreeBSD will not boot as an ISO, but the 1.63 version of Easy2Boot and a new MPI Tool Pack v0.044 or later supports FreeBSD 9 and 10 'memstick' images. For GhostBSD, download the .img files and not the .iso files. For MidnightBSD, use the 'memstick' download.
Read more: http://www.easy2boot.com/add-payload-files/freebsd/