I'm no FS dev, but I can tell you that:
There isn't any difference in the registry between "Normal" 2142 and "Deluxe" 2142. There are no different files installed with deluxe edition to normal 2142 either. HOWEVER, the bf2142.exe for 2142 and 2142 deluxe (and EA:DM) is different, and the FS launcher creates a "FirstStrike.exe" based on what version of 2142 you are using.
After a big search through a ton of shite, we found that the BFBC.wav was not present in the regular 2142 install, but was packed with 2142 deluxe: If the launcher detects BFBC.wav then thinks you are on deluxe. If you delete the file it thinks you are using regular.
So yeah, a little history there.
BlackIntel Game Leader
DUKE815: Teamwork's complicated. I've found that ramming a Lambda with a Y-wing at full boost is most effective.