Yeah…my experience has been that the feature you’re describing is software-dependent; that is you have to have a DVD-authoring software app that can enable alternate audio tracks; seeing as you’re on PC/Windows, I’m not too sure about solutions other than to recommend a pro app like Adobe Encore CS3 which supports alternate language coding and audio tracks; on the Mac OS, Final Cut Studio (suite) has DVD Studio Pro, which handles this feature quite readily, as does Roxio’s Toast 9 Premium.