I have a SUP file and I want to add some lines because in the translation some texts are missing. None of the sup manipulation programs I founded have this feature. One way to obtain this is converting the SUP in SST (Scenarist) format and changing the images, but I don't founded such a program. Adding more images and modifying the SST file may work, I'm not sure about that, but I have a SUP file, not a SST.

I apreciate any suggestion. Thank you.