One of my friends gave me a song today and wants me to remove the vocals from it. It is a very old recording, with few or no frequencies above 5khz. To top it off, the file is mono

, so using frequency cancellation between both channels doesn’t work at all. Would anyone be interested in trying his or her luck with the file? Any help would be greatly appreciated.
Edit - The file can be downloaded from
http://www.angelfire.com/mt/viper1313/1.mpc - To download, right click on the file and select "Save Target As"