Out-of-the-box, no. Project Threepio has a conversion script that can sync the subs against different video sources, but we don’t have a conversion string for SW Silver Screen yet. I’m hoping some kind soul posts one that works here (it’s not too hard to make one via trial and error, subtitle timing is very forgiving), and then everyone could just plug the string into the existing script and convert the subtitles. I also might get around to making a conversion string, but it’ll be a while, as I’ve got other things going on right now.