FreeBSD is not officially supported by any virtualization package as a host operating system at this time, but many people use older versions of VMware in this capacity. Work is also ongoing in getting Xen™ to work as a host environment on FreeBSD.
This, and other documents, can be downloaded from ftp://ftp.FreeBSD.org/pub/FreeBSD/doc/.
For questions about FreeBSD, read the documentation before contacting <questions@FreeBSD.org>.
For questions about this documentation, e-mail <doc@FreeBSD.org>.