Wow, lots of responses :)
borisanddoris explained things pretty well and this couldn't have been done without him! Big thanks for allowing this project to see completion.
Everything was done according to a DTS whitepaper. That is to say, the front channels were left alone, the rear channels were attenuated by 3db, and the LFE extracted from the rears using an 80Hz crossover filter.
Since the source disc was 44.1KHz at 24.000fps, and the destination was to be 48KHz at 23.976fps, some adjustments were made in order to keep audio video synchronization and allow for Blu-ray spec audio. The upsampling to 48KHz was done with the highest quality, keeping original pitch and ensuring there was no jitter. Framerate conversion was done with the eac3to tool and it did a remarkable job.
The six tracks, which came on 7 reels, were then spliced together using frame accurate editing techniques in Audacity. This was done simultaneously using multitrack mode and it took quite a few tries to figure out each reel's splice point since each reel ended with a beep and began with a repeat of the previous reel's ending.
After the editing was done, the movie was tested several times to ensure synchronization throughout... speaking of the movie... (how's that for a segue? pretty bad, eh?)
This preservation requires that you have the original, store-bought Blu-ray. It also requires that you rip the movie to your hard disk via your preferred method of ripping. You'll only need the movie, not anything else. My vote goes to MakeMKV since it'll work on Linux, Windows, or Mac OS X. Many people fancy AnyDVD HD (which came in very handy when I was frightened that my HD-DVD player would stop working one day and I can confirm that it is a solid piece of ripping software). Once ripped, you'll have a large 20GB+ M2TS video file. Keep it in a memorable place.
Since I love cross-platform tools, the next tool you'll need is tsMuxer. tsMuxer is the tool you'll use to multiplex (mux) your DTSMA file with your M2TS file. If you're using the GUI, simply drag your M2TS and DTSMA files to the "Tracks:" section of tsMuxer's GUI. From here, you'll be able to select your destination type. The choice is ultimately yours, however I chose M2TS because I will not be exporting to physical media. You can choose to output in a Blu-ray or AVCHD compliant file structure for exporting to physical media if you so desire.
One thing I must mention before signing off. There was one change made. The original DTS bumper was, well, bumped. Since this track is meant for those with the original Blu-ray disc, it had to be cut since it does not appear in the original Blu-ray. There were plans to include this, however the original bumper is not the same as any bumper I've found. It's a shortened version of "The Digital Experience" which clocks in at around 19 seconds (see: https://www.youtube.com/watch?v=KtzEa62KXBE).
As for the '97 DTS mixes... what would they be mixed to? I'd certainly be up for the challenge this summer, depending on the destination (Blu-ray, De-Specialized Editions, something else?). It should take about a week per mix to get them just right.
I'm going to try to have a more detailed instruction set before tomorrow afternoon if anyone thinks it's necessary. If there is demand, I can also write a script to automate the conversion.