Evilhead
Here's a link to the patch and a video of playing through the whole game, albiet with only one mario:

http://www.rllmukforum.com/index.php?showtopic=167174

Does not include the multiplicity mario though. I think that's another hack?

fluffy
The video is a different recording of the same game. The multiplicity hack is actually a patch to the movie recorder in the emulator, which records the entire play history (including rewinds), rather than just the final successful run. It doesn't look like this when you're actually playing the game.

If you go to the YouTube page you can see how the person did it.