mount --bind /dev FileSystem/dev
# CHROOT
cd Filesystem
chroot .
#MOUNT
mount none -t proc /proc
mount none -t sysfs /sys
mount none -t devpts /dev/pts
export HOME=/root
export LC_ALL=C
#sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 12345678  #Substitute "12345678" with the PPA's OpenPGP ID.
apt-get update
apt-get install --yes dbus
apt-get install -y ubuntu-standard
apt-get install -y casper
apt-get install -y lupin-casper
[...]

#UNMOUNT
umount -lf /proc
umount -lf /proc
umount -lf /sys
umount -lf /dev/pts
#EXIT CHROOT
exit
umount FileSystem/dev