Are you just looking for the name of the song, or the track itself? Here is the IMBD soundtrack listing:
http://www.imdb.com/title/tt0320661/soundtrack
Spoiler Alert, click show to read: 
Quote Originally Posted by IMDB
Please note that songs listed here (and in the movie credits) cannot always be found on CD soundtracks. Please check CD track details for confirmation.

* "LA ROI RENAUD DE GUERRE"
Traditional

* "VIDE COR MEUM"
Written by Patrick Cassidy
Performed by Danielle De Niese and Bruno Lazzaretti
Courtesy of Metro Goldwyn Mayer Music Inc.

* "THE CROW DESCENDS"
Written and Performed by Graeme Revell
Courtesy of Cherry Lane Music

* "RANNANU (SING WITH JOY)"
Traditional
Arranged by Christopher Moroney
Performed by San Antonio Vocal Arts Ensemble
Courtesy of World Library Productions, the music and liturgy division of J.S. Paluch Company Inc.

* "CITY OF ANGELS"
Written and Performed by Graeme Revell
Courtesy of Cherry Lane Music

* "SAZ VA AVAZ NAHOFT"
Written by Hossein Alizadeh
Arranged by Homayoun Shajarian, Kayhan Kalhor
Performed by Mohammad Reza Shajarian, Hossein Alizadeh, Kayhan Kalhor and Homayoun Shajarian
Courtesy of World Village Music

* "JESU MEINE FREUDE"
Written by Johann Sebastian Bach
Performed by The Hilliard Ensemble
Courtesy of ECM Production
from the album Morimur

* "FAMILY FEUD"
(from BLADE II)
Written by Marco Beltrami
Courtesy of New Line Productions, Inc.

* "CHANSONETTA FARAI VENCUT"
Written by Raimon de Miraval
Performed by Ensemble Convivencia
Courtesy of Bella Musica/Antes Edition

* "LIGHT OF LIFE (IBELIN REPRISE)"
Vocals and Lyrics by Natacha Atlas
Natacha Atlas performs courtesy of Mantra Recordings

* "VALHALLA"
Written and Performed by Jerry Goldsmith
Courtesy of Touchstone Pictures

* "EPITAFIO"
Written and Performed by Luis Delgado
Courtesy of Nubenegra

* "BALANSIYA"
Written and Performed by Luis Delgado
Courtesy of Nubenegra

* "Chansonetta Farai Vencut"
Performed by Ensemble Convivencia
Courtesy of Antes Edition/Bella Musica, Germany
(directors cut only)

* "Saa Magni"
Performed by Omou Sangare
Courtesy of Nonesuch Records/World Circuit
(directors cut only)

* "Nunc Gaudeant Materna"
Performed by Women's Voices of Sequentia
(directors cut only)