Listen to The Prodigy unreleased track Frequencies. I believe it was played live during their tour in 2004/05.
To be honest, I think I knew about this track at the time however forgotten about it… However I think there are a quite a few of us in this department :P
Anyhow, here it is:
Credit does go out to: http://forum.theprodigy.ru/index.php?board=43;action=display;threadid=41456