whats mdk? did you mean matroska?
all you need is ffdshow and haali's splitter to play these files in winamp. same as windows media player.
you'll also need to add ;mkv to the directshow file extension list.
preferences(ctrl+p)-->input-->nullsoft directshow decoder
append ";MKV" to the end of the list.(without quotations)
windows media doesn't support dvd playback unless you purchase a mpeg2 decoder. same with winamp...
same process as above just add ;VOB to the extension list.(although their is no menu/chapter/encription or real disk support it can at least play the files on the dvd)
tv and radeon tuner support works with a plugin.(as long as you have windows wdm drivers)
windows media files are shit, they sound like ass and they have drm right removal all over the format. why bother.