Save subtitles created in DVD Studio Pro as a new .txt or .srt file

I just did the authoring of a 52mn documentary with 4 subtitles tracks, we received from the translator .srt's files which we imported with no problem in DVD Studio Pro. The problem is that there was a lot of mistakes and badly timed texts due to the poor work of the translation cie. We had to edit the subtitles and it was very easy in the subtitles editor in DVD studio Pro...Now I have to do a master of the film on beta num and i want to provide to my post production cie a QT file of the movie + a .stl of the subtitles we edited within DVDSP : How can I export the text from the subtitles track to create a new .srt, without having to do it manually which is very time consuming

Hope i'm clear !

please amigos, help me !