Hi Ruger Lady (Interesting nick by the way, though I'm more of a Remington guy myself

)
I couldn't quite make out which scene you were referring to, but noticed in your post in the general discussion that it was the music playing during the shootout between Frank and Harmonica. As far as I know this track hasn't been officially released in it's full lenght.
I have what I think is a bootleg of this score, including the track you are looking for. Like in the movie you can hear the young Frank saying "Keep your loving brother happy" and an amazing gunshot at the end, so it's probably recorded from a DVD or something.
http://home.online.no/~a-solaas/28 - Keep Your Loving Brother Happy (Extra).mp3 (5:49 - 5.34MB)