Please help, I'm new to Audacity

I have the following file: http://rapidshare.com/files/138519118/Kane_New_Theme.mp3.html . I want the song in the background, but not the commentators and all the other stuff in the audio. Is there any way for me to keep the song but get rid of the other stuff? Thank you.

"Vocal Removal There is no magic bullet to solve what is in theory an insoluble problem. In practice there are various ways to try and trick your ears into thinking you have succeeded. "
http://audacityteam.org/wiki/index.php?title=Vocal_Removal