Funny thing is, dec_20.bin isn't actually there. I have dec_20.bch instead, here is a screenshot:
I assume I would edit it by inserting the .bch or .bin file I want to replace it with, correct? When I tried what I just said, the uncompressed file size is ???. When I saved and tried repacking the 3DS file from that and convert to .cia, the game would install correctly and run properly until after I choose my language. Am I even doing this right lol?
The ??? picture in the spoiler:
Also, why is my Ohana3DS window resolution so... compressed? Looking at the OP, the tabs aren't as squished as mine. I have .Net 3.5 or higher and the latest Direct X installed.
EDIT: I completely forgot about GarcTool; I used it on a133 and replaced dec_20.bch with my own. I think I need to rebuild whatever is in my 3_ folder and make it a 3 file to replace the existing one. I opened my 3_ folder with GARCTool to repack it, but it is a .garc file. I'm unsure as to what I should do next to pack this file into my 3DS ROM.
I've seen this picture in the spoiler, so I assume I delete my original 3 file, leave the 3.garc file, and repack the ROM at this point?
I tried repacking my ROM by deleting the original a133 and a021 and left the 3.garc and 1.garc for a133 and a021, respectively. I converted my ROM to a .cia, installed it, and after I select my language, the game throws an error, please turn off the system message. I can't give you the exact error report on it, because it's in Japanese, but I know enough Japanese to let me know it was an error. If anyone has done a model swap before, could you help me out here? I've been stalking many threads about this topic but there was no one thread that clearly explained it well enough to let me know if I'm actually doing any of this right.