Hi Agathosdaimon
I get my Tornado music by copying a modded FLIGHT.EXE and pasting into a full installation of Tornado 1.0E's C:\TORNADO\TORNADO\FLIGHT folder.
During the game, make sure you hit the 8 key to cycle through the various sound settings. To have the intro music playing in the sim, you have to go to the Options | Preferences part of the GUI and set your music/sound options.
(http://www.moodurian.com/tornado/images/visuals/tornado_sound_settings.PNG)
Also, if you have the development environment, after you link the FLIGHT.EXE, when you run the program, you can do so with the /ma flag to play the theme song. As in:
D:\TORNADO\FLIGHT\FLIGHT /a /ma
regards
Frankie Kam