Whats this song called?

[Obviously not Gopib]

Heard it in Fear and Loathing in Las Vegas, cant find a name anywhere...
<a href="http://www.youtube.com/watch?v=ndStRcvfYAo" target="_blank">http://www.youtube.com/watch?v=ndStRcvfYAo</a>
Anyone know?

[Ima]

Heard it in Fear and Loathing in Las Vegas, cant find a name anywhere...
<a href="http://www.youtube.com/watch?v=ndStRcvfYAo" target="_blank">http://www.youtube.com/watch?v=ndStRcvfYAo</a>
Anyone know?

According to the interwebs (we all know how accurate that means), That's supposedly the only and the longest version of the song.. Made only for a few scenes in the movie..