I like your site so far, looking good, easy to navigate and a great idea behind it. I noticed that this info in your Theatrical Audio Resources is incorrect.

"In 1993, the sound was remixed in stereo again, this time "sweetening" the audio with added effects in Star Wars. In 1995, the mix was tweaked for a THX-certified release, adding a few of the original mono mix effects."

The 1993 remix was THX-certified and it's also the same audiotrack that was used for the 1995 release.

Here is also a great article about the creation of those audio tracks:

http://www.originaltrilogy.com/forum/messageview.cfm?catid=9&threadid=5739