That's a great ad, I like the music added as well. Must have been a fun project to work on.

Those lighting tutorials are interesting, I was reading them a while back. Like Genny said, if you throw in a mr node instead like the parti volume shader you'll find a lot more info than you would for Maya's environment fog because this one is used in 3ds max as well where more exteriors and scenes like this is done. And even if it's a bit different you should be able to get the info translated to maya and there is a lot of it on many blogs. So it might be a better way to go.
Off topic dabu, are you the guy who posted up a thread many months ago that you were going to make an underwater sub but you never used maya before?