just to add to Colorado, on third and fourth down conversion defense everyone in the stadium shakes their keys. that would be a cool sound effect to get in there.
i also agree that it's a MUST that you get the uncensored F'em up fight song in there. when i was at cu and used to go to the games, i heard/yelled "f*ck em up, f*ck em up, go C-U!" more than any thing else. it would really add to the feel of seeing a game at CU.
along the same lines, "bullsh*t" chants for pentalties on the home team would also be pretty cool and accurate.
