Not much interest in this kind of thing anymore, as you might imagine.
In January, I posted this in Assassin's thread:
"It's probably not worth a whole "Guide," but there must be a couple of us who are interested in backing up our HD DVD collection, and I haven't been able to find much information about that. I have, despite that, been reasonably successful.
I have an XBOX 360 HD player. I'm using Clown_BD, which requires Java runtime (JRE), eac3to, tsMuxeR and ImgBurn (all free), and AnyDVD (not free). Installation is relatively straight-forward, and links to the other programs (besides AnyDVD) are provided by Clown_BD.
The end result is a BD-structure folder and, if desired, an ISO file. I now have, for example, a BD of my Eagles Farewell Tour, in DTS-HD MA. And, of course, a new category in my media collection."
There was absolutely no interest, so you're pretty much on your own, though Clown_BD is here:
(download the package), and you already have AnyDVD.