You can extract the dts.wav files using say: EAC, CUEripper (which is what I use) or even Windows Media Player 12.
Once you have the dts.wav file or files, you can then run them through an application called 'DTS Parser v2.0' to extract the dts stream out of the .wav container.
I've recently done this myself with all of my 'Digital Surround' CD's. And only struggled with one track from one disc