Ahh, I get what you're saying now, I'm pretty sure you can just re-inject FBI into H&S using the same method in Plailect's guide, but instead of emuNAND it's sysNAND
Sadly, I tried it, launching decrypt9 from the homebrew menu just makes it try and load, then boot me back to the homebrew launcher ~ 5 seconds later. I'm really stuck, and I've been trying to fix the thing for about 3 hours now. It's 2:15 am now, and I think I'm just going to give up for the night.