Satanika reports that he has obtained the files I sent him and that the ESB 5.1 should be ready soon. So, yay. :) Once I have it I'll test it out to make sure everything is as it should be and then it will be available. I'm quite pleased with the way this turned out, although I wish I'd been able to finish it faster.
I'm also going to do some tweaking to the LFE channel of RotJ to achieve a better balance, but this will amount to minor changes only.