So, I'm trying to make a ROM hack of Harvest Moon 3D: A Tale of Two Towns. I want to switch the sprites for male and female and do some dialogue changes. I unpacked the Rom using HackingToolkit9DS, and have an extractedromfs folder. I've found a lot of graphics (though not the over-world sprites yet) and some animation files, but all other files are stored as bin files.
From what I've gathered, bin is a general file type, and these files are any kind of file, and I should look at the header to the files to find out what kind they are. Thing is, I'm not quite sure how to do that, and searching the first few bytes of a file gives me nothing when I look at file header type lists. I also am not sure if the files are compressed, I don't think they are, since, as someone mentioned in another thread, the number of times each byte occurs is not the same, so it's probably not compressed.
I would really appreciate if someone could explain or link to an explanation of how to properly look at headers, since there don't seem to be any documents here that explain them (not that I've been able to find). Thanks in advance