I posted this and some other pronunciation questions in a new thread here:
http://originaltrilogy.com/forum/topic.cfm/How-to-pronounce-the-names-of-the-creators-of-Star-Wars/topic/17138/
Figured there are plenty of people who probably know the correct pronunciations, but few of them who are also interested in this somewhat arcane topic.
I have two scripts complete, the third (Jedi) may be harder than the others, due to big chunks of video missing in the SE.