Removing unwanted voice?

Hi,

I have a few audios from a soundtrack and would like to get rid of the certain cheer sound and commenter’s voices in it like the follow:

[Original version] http://www.4shared.com/audio/AK_fd_CS/PARANOiA_EVOLUTION_FROM_NONSTO.html

[Final Result] http://www.4shared.com/audio/kVF1uKQa/PARANOIA_EVOLUTION__From_NONST.html

However, I am not sure how to do it as the above music wasn’t edited by me… i just found it randomly on the internet.

Here is the music I am trying to edit…

http://www.4shared.com/audio/PyHkWqRh/LOVE_THIS_FEELIN__FROM_NONSTOP.html

*You don’t need to download the music, the player will appear shortly after the page loaded.

If anyone can help would be greatly appreciate any tips or hints.

The male commentator-style voice (“disco Bobby”) is only on the right track.
The quickest solution to get rid of “disco Bobby” is delete the right channel and make a pseudostereo from the left, e.g. …

Disco Bobby Has left the building.mp3