A post by boon23 led me to here. I am the one who has edited Gangs of New York. The edited film was set up with a torrent and was uploaded to Pirate Bay by ineptuser of www.gatheringofgeeks.org/forum.
I had wanted to edit this movie for a couple of years, and finally got around to doing it over a couple nights last week. I was kinda surprised at how relatively easy it was for the most part. Maybe my theory that the character played by Cameron Diaz really wasn't necessary was correct all along! Unfortunately, I had to leave her in a few scenes, particularly at the end, when she is walking with Leo. But, up until that point, she appears to be nothing more than a minor bit player in Leo's ressurrected Dead Rabbits gang.
If any of you watch it, I would welcome feedback
Thank you to the OP, for finding the torrent description and spreading the word.