I'm very new to hex editing, but I thought it was simple enough that I could do it on my own. So, I'm trying to put Circleseverywhere's FE8 Native Instruments BIN into my FE8 hack, and it worked perfectly with a clean file (the custom music works and everything).
Now, I tried the same with my edited ROM, which has nightmare edits and text/portrait/sprite edits from Feditor Adv, and the game crashes whenever actual gameplay comes up. I can navigate the title screen and even access the sound room to hear my custom music, but the World Map and Link Arena cause the game to freeze. I tried inserting the BIN into the free space at 00B2A610 and free space I made myself at the end of the ROM, both with the same results. Another quirk is when I start a new game: immediately after the cutscenes end, the game resets itself.
Is there an issue with the free space that's conflicting with Feditor Adv or Nightmare? And if it is, is there an easy fix or would I simply have to start all over with a clean ROM?