1) To create the "image" use:

   sudo tar --numeric-owner --owner=0 --group=0 -czvf /tmp/boot.tgz *
   sudo tar --numeric-owner -czf /tmp/root.tgz *

2) To create the MBR image use:
   sudo dd if=/dev/sdc of=mbr.bin bs=512 count=1

3) To write the imate to an SD card set the SD card device
   in the ./install.sh script and then call:

   sudo ./install.sh