The hit zones seem to be:
Head, Brain, Eyes, Neck, Torso, L. Arm, R. Arm, L. Hand, R. Hand, L. Leg, R. Leg, L. Foot, R. Foot and "Vitals"?
I can't make out the writing on the "INSTANT/AUTO" screen before the combat though. I wonder what that was for.
EDIT: Also, I think the assault rifle...