The redump versions of most of the games I've downloaded have worked, thanks - though In the Hunt still won't boot lol. Just goes to a black screen. Maybe the issue is with 21 pin Fenrirs? That's what I have, and I'm running the latest firmware for it since I just got the thing yesterday haha. Dunno what's up with that.
I will say, Shining Force III runs much, much better on Fenrir than when I was using crappy burned CD-Rs with my Saturn and a Pseudo Saturn Kai. I don't know if my laser was going bad or if the Saturn just struggled to read CD-Rs (or discs in general), but whenever SFIII would transition between locations, loading took far, far longer than it does now, which is nearly instant. Game runs at a nice little clip, now. I'm three battles in and not annoyed with loading times! Hooray lol