Here's an example of what I was talking about with adjusting gamma to bring out colors. Left is untouched BD, right is gamma-adjusted. See how Alan/Tony's car becomes truly red? Adjusting only the brightness, the car gets darker but not redder.

Of course, I have no real point of reference for any of this, but I believe that's likely closer to correct. Anyway, for those who want to give my script a run, here's a warning: my script makes most of this movie pretty dark. Dark interiors, night scenes, etc can be pretty murky in parts--not crushed, but pretty damn black. Again, this is without a reference (I don't trust any DVD release), so I just did what seemed right, and I'm not entirely satisfied with the results either. YMMV.