Well, the biggest hurdle will be all the mixing involved in that. IMO, you are MUCH better off trying to make your own, new sound font, because each individual SF is going to have a different hum, and as you swing and clash the saber, you will hear a very audible change in the pitch. So you are much better off trying to fabricate something new (honestly isn't too difficult to grasp, just very labor intensive/time consuming.....I mean, I, of all people, made a semi-nice sounding font based on the band Rush....it wasn't a finished product, but it was okay for only taking me like two hours to make.). Just rip some audio from the dvds, or find some generic sampling off youtube SFX compilations, etc, into Audacity. There, you can alter the pitch, speed, tempo, etc....also, you can get creative with heavily altering other sounds (original hum was a modified 8mm projector combined with feedback loops). Audacity's the only program I used. The biggest tip I can give is to make sure you match up the waveform of where the sound file starts and ends, so it doesn't sound choppy when the sound is played.