The pre-THX one might be free from DVNR but as far as I know that one used an atrociously bad master. I assume the one seen in this post... http://originaltrilogy.com/forum/topic.cfm/Preserving-French-Original-Trilogy-ANH-V10-released-ESB-in-progress/post/577965/#TopicPost577965
...is the one you're referring to?