In other news, this is phenomenal.
http://originaltrilogy.com/forum/topic.cfm/Isolating-Music-and-Voices-in-Star-Wars/post/668489/#TopicPost668489
I gave it a go with our good friend Ric and the results were quite impressive. Unfortunately I messed up the audio recorder settings, I'll upload a better version when I have more time.
WARNING: Set your audio level low before watching, the screwed up settings result in terrifying noises when turned up too high.