I just registered to these forums in regards to finding this song, and I'm glad I found this spot.
This is an EXTREMELY difficult piece to find. Someone's gotta know their music pretty damn well to find this short guitar riff we've been hunting for (I've been looking for it for about 2 years now). I am over on some other forums that I've been in since 2004 (tranceaddict.com), and have offered money to those who can find this song. Still no luck.
Here is the episode where the God forsaken song layeth =] (segment 3). It is right after Bam tells Vito to whisper, and Vito says "Pistachio....pistachio", then the damn guitar lays a sick, short entourage of metal. It only last a few seconds.
If ANYONE is willing to hunt this down and finds the piece, I will honestly pay you a reasonable amount of money for putting forth the effort, no kidding, no bull, honest to God I will do it.
Email me at anytime at email@example.com, or myspace.com/crpereira. I'll keep checking back here every now and then to see if there have been any updates, just in case we hit the jackpot.