Hey jshew,
It's easy to create your sub files with VobSub and MovieStacker.
In the
VobSub settings (in MovieStacker) make sure you select
Indexed Subtitles and the
Subtitle input file edit box is clear. Then press the
configure subtitle button. This will open the VobSub configure dialog. Press Open and at
file type select
Ifo and Vobs, for creating idx/sub.
Now select your IFO file and then the folder you want to create the subs (can be the same folder of your source). That's it! When the process finish you should have the
idx/sub in the same folder of your source.
Pressing
AUTO in MovieStacker will auto fill the
input file edit box.
Now test your script and see if your subtitles are the way you want. You can go back to the VobSub configure dialog and edit the size/position/etc of your subs.
BTW,
vsub23.dll is needed just with TextSub filter. VobSub filter do not need it. But surely it will not hurt.