regarding the Japanese T2 DVD which apparently had the CDS track encoded as full bitrate DTS 5.1
it's this release
http://www.ebay.co.uk/itm/Terminator-2-Japan-DTS-Limited-Edition-Slipcase-DVD-2003-PIBF-91219-Rare-OOP-/252058868597?hash=item3aafe11b75