I read quickly through the thread you linked. Your problem appears to be quite unique and difficult to resolve.
Personally, I would uninstall all previously installed DS filters and reset all MC playback settings to the defaults (a full uninstall with "remove registry settings" may be requiered for that if you have severely tweaked the DS playback settings.)
Then I would install only CCCP (for usual video file formats, like Xvid AVI ) and in addition the DScaler5 MPEG2 video decoder and AC3 audio decoder filters for DVD video playback. On my simpler system (an XP laptop) the latter two get used automatically without any additional tweaking and DVD playback works fine without changing any playback settings inside MC. The DScaler and AC3 filters are included in the "Full" K-Lite package (download the latest version). My HTPC has a very tweaked configuration which is changing all the time and it would not be useful to describe it here.
However, what works for me may not work on your PC. For instance, the full K-Lite package contains several MPEG2 decoders that you can try. In any case you should always first uninstall any installed additional filters and only after that try new filters.
EDIT
Here's my filter graph as reported by MC during DVD Video disc playback:
Filter Graph Info:
Filter 'Default DirectSound Device'
CLSID: {79376820-07D0-11CF-A24D-0020AFD79767}
Host: C:\WINDOWS\system32\quartz.dll
Input Pin 'Audio Input pin (rendered)'
Connected to pin 'Out' of filter 'AC3Filter'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'Video Renderer'
CLSID: {70E102B0-5556-11CE-97C0-00AA0055595A}
Host: C:\WINDOWS\system32\quartz.dll
Input Pin 'Input'
Connected to pin 'Output' of filter 'Overlay Mixer'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_Overlay, Format type FORMAT_VideoInfo
Filter 'AC3Filter'
CLSID: {A753A1EC-973E-4718-AF8E-A3F554D45C44}
Host: C:\Soft\AC3Filter\ac3filter.ax
Input Pin 'In'
Connected to pin 'AC3' of filter 'DVD Navigator'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DOLBY_AC3, Format type FORMAT_WaveFormatEx
Output Pin 'Out'
Connected to pin 'Audio Input pin (rendered)' of filter 'Default DirectSound Device'
Major type MEDIATYPE_Audio Sub type MEDIASUBTYPE_PCM, Format type FORMAT_WaveFormatEx
Filter 'Overlay Mixer'
CLSID: {CD8743A1-3736-11D0-9E69-00C04FD7C15B}
Host: C:\WINDOWS\system32\qdvd.dll
Input Pin 'Input0'
Connected to pin 'Video Out' of filter 'DScaler Mpeg2 Video Decoder'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YUY2, Format type FORMAT_VideoInfo2
Input Pin 'Input2'
Connected to pin 'XForm Out' of filter 'Line 21 Decoder'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_RGB32, Format type FORMAT_VideoInfo
Input Pin 'Input3'
Output Pin 'Output'
Connected to pin 'Input' of filter 'Video Renderer'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_Overlay, Format type FORMAT_VideoInfo
Filter 'Line 21 Decoder'
CLSID: {6E8D4A20-310C-11D0-B79A-00AA003767A7}
Host: C:\WINDOWS\system32\qdvd.dll
Input Pin 'XForm In'
Connected to pin '~CC' of filter 'DScaler Mpeg2 Video Decoder'
Major type MEDIATYPE_AUXLine21Data Sub type MEDIASUBTYPE_Line21_GOPPacket, Format type TIME_FORMAT_NONE
Output Pin 'XForm Out'
Connected to pin 'Input2' of filter 'Overlay Mixer'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_RGB32, Format type FORMAT_VideoInfo
Filter 'DScaler Mpeg2 Video Decoder'
CLSID: {F8904F1F-0371-4471-8866-90E6281ABDB6}
Host: C:\Soft\DScaler5\MpegVideo.dll
Input Pin 'Video In'
Connected to pin 'Video' of filter 'DVD Navigator'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_MPEG2_VIDEO, Format type FORMAT_MPEG2_VIDEO
Input Pin 'SubPicture'
Connected to pin 'SubPicture' of filter 'DVD Navigator'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DVD_SUBPICTURE, Format type FORMAT_MPEG2_VIDEO
Output Pin 'Video Out'
Connected to pin 'Input0' of filter 'Overlay Mixer'
Major type MEDIATYPE_Video Sub type MEDIASUBTYPE_YUY2, Format type FORMAT_VideoInfo2
Output Pin '~CC'
Connected to pin 'XForm In' of filter 'Line 21 Decoder'
Major type MEDIATYPE_AUXLine21Data Sub type MEDIASUBTYPE_Line21_GOPPacket, Format type TIME_FORMAT_NONE
Filter 'DVD Navigator'
CLSID: {9B8C4620-2C1A-11D0-8493-00A02438AD48}
Host: C:\WINDOWS\system32\qdvd.dll
Output Pin 'Video'
Connected to pin 'Video In' of filter 'DScaler Mpeg2 Video Decoder'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_MPEG2_VIDEO, Format type FORMAT_MPEG2_VIDEO
Output Pin 'AC3'
Connected to pin 'In' of filter 'AC3Filter'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DOLBY_AC3, Format type FORMAT_WaveFormatEx
Output Pin 'SubPicture'
Connected to pin 'SubPicture' of filter 'DScaler Mpeg2 Video Decoder'
Major type MEDIATYPE_DVD_ENCRYPTED_PACK Sub type MEDIASUBTYPE_DVD_SUBPICTURE, Format type FORMAT_MPEG2_VIDEO
Apparently only the Microsoft's default "qdvd.dll" and "quartz.dll", DScaler5, and AC3Filter filters are needed for successful DVD video disc playback.