So many people think that FBI has reinand rop and im not sure why, since ROP code at somepoint has to call reinand.dat and read the rop in that. FBI is most likely for GW's Launcher.dat .. The ROP .nds thing is in the OP. Just need to compile. And I think I put it in the pre-compiled release too.
FBI does have reinand ROP in it now. It's not listed, but it's there.
Install various MSET ROP chains, including encrypted Gateway 4.x, decrypted Gateway 4.x, N3DS Gateway 9.x, rxTools 4.x, MsetForBoss 4.x, and MsetForBoss 6.x.
https://gbatemp.net/threads/release-fbi-open-source-cia-installer.386433/