Film scoring exercise using video imported from DVD or Blu Ray

Sonar/Film Score types:  

This is a long post with a lot of technical questions, but I'm certain the answers are simple.  I hope I don't get a bunch of weird flames about how sonar isn't to be used to score films (cuz it is), and sonar isn't a video editor (cuz that ain't what I'm doing)...

I want to score a film with no existing non-diegetic music as a learning exercise, and I'll be doing a 5.1 surround mix.  There are several films that would be good for this, available on DVD and Blu Ray.  

I'm unfamiliar with various encoding standards and file wrappers and translation software available.  A few questions:
(1) Importing to Sonar

I want to extract the video and audio from the DVD or Blu Ray, and wind up with:

(a)  a video file that is a manageable size "scratch copy" of the original to play back in sonar (say, an MJPEG in an avi wrapper), and
 
(b)  6 separate high quality audio files of pure/uncompressed audio data with the same bit depth and sample rate as the original, that will sound exactly like the original.  

This must be do-able with a few file manipulations, but I don't know what software to use or what steps to go through.  I suppose I need to start by defeating some security features and rip to HD with a full uncompressed result (never done that don't know what to use).  Then I need to somehow get the AC3 or DTS file out of the ripped master movie file.  Then I need to get the 6 audio files out of the AC3 or DTS (or something like that), then I can import those audio files as 6 audio tracks in Sonar.   I may be mixed up, but that work flow seems logical to me.

- What is the simplest work flow and what software is good for these steps?  

- Also, when playing a video in Sonar as a scoring reference, does Sonar ignore audio that might be contained in the movie file, or perhaps automatically extract it into 6 audio tracks (seems unlikely)?  Or do I need to make a special video file with no audio? 

(2) Exporting to DVD or Blu Ray

After I'm done creating my cues in Sonar, and I'm happy with the surround mix, I'll have 6 new audio tracks (the original content with my stuff added for each channel of the surround mix).  I'll then need to get that back into a into a DVD or BLU-Ray, along with the original high quality high res video stream, and have that be playable on any standard DVD or Blu Ray player equipment.

(a) what do I do after the final master surround mix is done - can Sonar create an AC3 or DTS file?  if not, whats the process to get there?

(b) once I have the 6 tracks from Sonar encoded into an AC3 or DTS file (I guess thats what you need), I want to combine that with the original high res video file that I originally extracted from the DVD or Blu Ray, and burn that onto a DVD or Blu Ray.  Again, the final disc should play in any player just like a commercially manufactured disc. What software, file formats, etc. do I use? 

(3) Overall sync?

Do I have to do anything to preserve the synchronization between the video and audio streams throughout this process, or is that just going to happen automatically?

I have Sonar X1d Production Suite, so I should have all the latest bells and whistles (and bugs!).  I've got plenty of HD space, lots of ram, a fast machine, blah blah..  just need to know what SW and what file formats and work flow to use to accomplish the above.  

Thanks y'all!
Joe