I don not hear a song but only instrumental music. as for the composers: according to "soundtracknet" site there is music:

# "City of Gold" - X-Ray Dog
# "Titans (No Choir)" - X-Ray Dog
# "Prometheus" - Immediate Music
# "Cut Me" - Brand X Music
# "Bittersweet Dreams" - Brand X Music
# Harry Potter And The Prisoner Of Azkaban (2004): "Apparition On The Train" - John Williams

good luck in finding it.
Hope this helps,

Cheers!

rmensing, January 4, 2009; 8:30 AM