Someone

gpart create -s GPT ad0
gpart add -t freebsd-boot -s 128 ad0
gpart add -t freebsd-swap -s 2G ad0
gpart add -t freebsd-ufs ad0
gpart bootcode -b /dist/boot/pmbr -p /dist/boot/gptboot -i 1 ad0
newfs /dev/ad0p3
mount /dev/ad0p3 /mnt

cd /mnt
mkdir usbstick
mount /dev/ad1a /mnt/usbstick
export DESTDIR=/mnt
cd /mnt/usbstick/8.2-RELEASE/base
sh install.sh
cd /mnt/usbstick/8.2-RELEASE/kernels
sh install.sh GENERIC

cd /mnt/boot
rmdir kernel
cp -Rp GENERIC kernel

vi /mnt/etc/fstab
/dev/ad0p3 / ufs rw 1 1
/dev/ad0p2 swap swap sw 0 0

vi /etc/rc.conf
ifconfig_em0="DHCP"
sshd_enable="YES"
hostname="testbox"



VBoxManage convertfromraw -format VDI [filename].img [filename].vdi


qemu-img convert -f raw [filename].img -O vmdk [filename].vmdk