If you're still after subs,
here's what I ended up doing for my brother. I didn't really have time to look at the lyrics, and so only made minor corrections to the stuff that really jarred me, but other than that, I do hope the film will make a bit more sense now!
If you're up for it, do you want to try remuxing the subs to the video? I took them from the Coalgirl's file, so if you are game to try, you can get their typesetting etc. BSS subs has a pretty good
visual guide about how to use mkvtoolnix.