chroot +X

chrootX.sh

#!/bin/bash
# @see: http://wiki.ubuntuusers.de/chroot/Live-CD

# mount partition
mount /dev/sda1 /mnt

# mount boot here if neccessary

# mount system environment
# .X11 is for xserver and resolv.conf for networking
for i in /dev /dev/pts /proc /sys /run /tmp/.X11-unix /etc/resolv.conf; do mount -B $i /mnt$i; done 

# allow local x-server-connections as it is not going to be started in chroot:
xhost + local:

# do the chroot
chroot /mnt /bin/bash