If interesting, a music pack has been uploaded here:
http://www.moddb.com/games/doom/addons/ ... -episode-2
It replaced the Episode 2: The Shores of Hell music in the original Doom (Ultimate Doom). Also, three replacements for the Title, Intermission, and Victory screens.
New Age (movie-like soundtrack feel) is the genre of the music (if you like that kind of music).