Woah, cool portrait. Well, now we know it works, thanks Stephen!
Just another thought here, what if we bi-packed an ortho film with some infrared film and have a red filter in between (assuming the ortho film didn't have an anti-halation layer)? So light would hit the ortho film and capture the green and blue. Then the red filter would block the green and blue and let the infrared film capture the red and infrared.
Perhaps we could even apply the resulting negatives to this theory http://www.greatreality.com/Color2Color.htm
I wonder what would happen...