In the trailer for "Almost Famous," there is a full band/orchestra version of "Classical Gas" that isn't used in the movie. Who performs it?

Here is the trailer for "Almost Famous" for all us AFT GOOGLE sleuths.

http://www.youtube.com/watch?v=Qw0eVDEfFio

And here is the clip of the beautiful musical piece "Classical Gas".

http://www.dipity.com/timetube/YouTube_Classical_Gas

Watching the video from the link provided by star_gazer, I did not hear "Classical Gas".

My breakdown of the video:
0:0-014 ?
0:14 - 35 "Sparks" The Who
0:35 - 1:46 "Something in the Air" Thunderclap Newman
1:47- 1:51 silence
1:52 - end "Tiny Dancer" Elton John

Soundtrack song list from: http://www.amazon.com/Almost-Famous-Various-Artists-Soundtracks/dp/B00004XR5G/ref=sr_1_1?ie=UTF8&s=music&qid=1266983142&sr=1-1

1. America - Simon and Garfunkel
3. It Wouldn't Have Made Any Difference - Todd Rundgren
4. I've Seen All Good People: Your Move - Yes
5. Feel Flows - The Beach Boys
6. Fever Dog - Stillwater
7. Every Picture Tells A Story - Rod Stewart
8. Mr. Farmer - The Seeds
9. One Way Out - The Allman Brothers Band
10. Simple Man - Lynyrd Skynyrd
11. That's The Way - Led Zeppelin
12. Tiny Dancer - Elton John
13. Lucky Trumble - Nancy Wilson
14. I'm Waiting For The Man - David Bowie
15. The Wind - Cat Stevens
16. Slip Away - Clarence Carter
17. Something In The Air - Thunderclap Newman