I ripped them from the game files. Freelancer is a rather old game and the .wav files are a bit iffy. I could play them through Sony Vegas, but it seems that all that's causing it to screw up now is that file encryption.
I would recommend having to do it the hard way. That's how I did it with all my Star Trek soundpacks.
Star Trek Voyager Elite Force is a really old game too. I recorded the sounds in-game with fraps, then, using RealPlayer, I converted the videos of them to MP3 format, which I then opened in audacity and did the final conversion to WAV. This method has always worked for me, and it has been worth the extra work.