Oh, right, I forgot you were in Reigon 2-land. Yeah, the first Reigon 1 edition had all the typical extras (workprint scenes, the hour-long dog, etc), plus the isolated score and a Dolby 2.0 dual-mono audio track, which I assume was the original audio mix. Check out this comparison of the various editions. The only advantage the box-y R1 version had over the one with the isolated score is the neat packaging with the reproduction of Henson's notepad for the film.

And yeah, I got the limited edition OST when it was first released, for a birthday present.