Make sure you delete android.img.gz LAST.
And why would Order of deletion matter?
Actually, delete zImage last. The order matters because if you deleted zImage first, no touch. Delete android.img.gz first, iDroid GONE.
This doesn't really make sense... deleting either zImage or android.img.gz will result in a non-booting idroid AFAIK
This will make him boot directly into OpeniBoot Console so OpeniBoot can be uninstalled or the NVRAM flags changed.