Great addition. The confusion on this route (these routes) is partly because there is a technical approach pitch (5.5 chimney or 5.8 corner) that's below either of these route lines and above the various scrambling approaches. If you follow the 5.8 corner, it dumps you right at the base of the red line, which is roughly the route of Central Crack. The Central Ramp is the yellow line. You can climb pretty much anywhere on the lower ramp, with the radiating cracks, at 5.7 or 5.8. (We did two pitches well to the left of the yellow line.) Pro will vary with the line, though.
This is the same picture Justin submitted. (I hope you don't mind that I borrowed it). The yellow line shows the approximate line that we climbed, as I described in my comments on the route. We definitely felt that we were on route the whole way (although I climbed this many years ago, so the yellow line is approximate). Hopefully this might clarify. Henry, any comments?