The default OAUA Overture tune, which Darius employs often in his Tale of Twin Dragons
mods, is the theme song to the Once Upon a Time in China
series and was adapted from a Ming Dynasty folk song "Under the General's Orders"; the version used for the films was written by Wong Jim and its title is translated as "A Man of Determination," here from the first film: http://www.youtube.com/watch?v=sYY04f203eo&feature=related
An alternate translation, which I prefer is "A Man Should Better Himself."
Here's the opening of the second in the series (which many argue to be Jet Li's finest film, Hero
notwithstanding) with the lyrics subtitled: http://www.youtube.com/watch?v=6Qopry2-5WE&feature=related
I had the good fortune of seeing this one in the cinemas, and it was awesome.