The original version was a Krayt (sp?) dragon noise while the 2004 DVD is of the lizard thing from Ep 3.
I assumed that the lizard thing from Ep III is a Krayt Dragon. Even before I'd seen Ep III I'd decided not to change the sound in the DVD, and I'm glad I didn't because I like the link. The original noise sounded too similar to a Dewback, to me.
DE