1. Rip the dvd as one big vob file. I use dvdshrink to do this. There is a checkmark in the options to not split vob's.
2. Demux the vob file with vobedit. This will give you an ac3 audio file and a video file.
3. Use hypercube transcoder to split the ac3 into six seperate wav files. One of these will be the center channel.
Once again, thank you TJDavis1138, and also InfoDroid for telling me who to ask.