With the secondary distributions installed, the steps to use them are:
mount --bind /proc /opt/distros/redhat_6.2/proc mount --bind /tmp /opt/distros/redhat_6.2/tmp |
mount --bind /home/USER/src/PROJECT /opt/distros/redhat_6.2/USER/src/PROJECT |
xhost +localhost chroot /opt/distros/redhat_6.2 /bin/bash |