how to edit nro in romfs?

[SamuraiHunter168]

I want to mod the game files in romfs which is nro file. I want to know how to do it. Thank you very much.

 

[masagrator]

NRO is an uncompressed executable. So... hex editor?

And if you know nothing about assembly, then you will have a hard time.

 

[SamuraiHunter168]

NRO is an uncompressed executable. So... hex editor?

And if you know nothing about assembly, then you will have a hard time.

I found some information that in the game there is an .nrr file, which is used to verify the .nro file. Because of that, it might be difficult to directly edit and rebuild the file. However, I learned that we can make an IPS patch for .nro as nro_patches.


I know how to make an IPS patch for main.nso, but I’m not sure about the following:

1. How can we find the offset to modify in an .nro?
2. I know how to create an IPS for .nso using IPSwitch, but how can we create an IPS for .nro?

Thank you in advance.

Post automatically merged: Sep 3, 2025

NRO is an uncompressed executable. So... hex editor?

And if you know nothing about assembly, then you will have a hard time.

I want to modify the raw data in an .nro, but after doing a hex edit, it won’t load. I think this is because of the .nrr, which prevents it from loading