Holy cow did that take a looong time. I processed both the 5.1 original DVD and the 7.1 surround bluray. Both versions have a mixed center channel (dialogue mixed with music), but only music on the stereo and rear channels.
Not great at all. But I couldn't even just subtract the stereo from the center. They did some pretty strange processing on it that was messing me up. I finally worked out a way to undue most of it, and use it as a reference to isolate the vocal.
I now have about as clean as a version of "Welcome to Jurassic Park" as I think is possible. I can't explain the subtlety of how much better this method is than my earlier attempts. Virtually zero music intrusion, and a preservation of the vocal that captures the gritty-ness and breathy-ness of the original. You barely notice how much better it is unless you compare it side-by-side to the processed, mechanized, and clipped junk that were my first attempts.
What's the best way to get this file out there? I'm actually pretty eager to hear your thoughts on how it came out.