When I listened to Adywan's 5.1 (not in 5.1, sadly), I didn't notice any of the SE alterations, and that includes the music edits. I believe he used portions of the '93 mix upmixed to 5.1 for those scenes (with some blending to make sure the difference wasn't too noticeable). He also reinstated the snowspeeder crash sound.

I dunno, maybe I'm remembering wrong. I'll check later on to be sure.

And I don't really mind either way about the Rancor.

And Harmy, a black mask over the letterboxing is absolutely essential, trust me. Make sure it covers the black bars entirely (so we don't see a thin strip of gray over some scenes), but covers up as little of the picture as possible (preferably none at all).