How, okay !
D2S does not read avs. It reads only avi and ifo.
You have to :
1/ modify you dvd2svcd.ini file in order to enter the filter you want to use in the "frameserver" tab of dvd2svcd. See the method I explain there :
http://www.kvcd.net/forum/viewtopic....424&highlight=
And the last evolutions of the MA scripts converted into a D2S file here :
http://www.kvcd.net/forum/viewtopic....786&highlight=
Or you can :
2/ convert your avs into a pseudo avi file using the tool "makeAVIs" provided with ffvfw.
And finally, you can (and that is perhaps the easier for you) :
3/ go to "frameserver" tab of D2S, ask for "edit the avisynth script during video conversion" and launch the job. After audio encoding, a window pops up with the avs script D2S is going to use for the video. Just paste your Moviestacker script there and press "ok".