I'll give that a try, thanks. As for the bromides, it's a hard fail 100% of the time -- perfectly consistent, I don't remember exactly where it breaks on me, but it's the exact same point every time and I never see any portion of the cutscene. Once I get a chance to update the firmware, I'll try the bromides again too.
So, I tried the duo firmware by mistake at first, and naturally it didn't work. But then I realized I was supposed to use the 21 pin firmware for my 21 pin fenrir, and unfortunately when I tried that (put the update file in the sd card root, re-inserted the sd card and turned it on) and it looks like that didn't work either. Everything is basically the same as before; bromides still black-screen, same Kyle dialogue loop during the cutscene