ROM Hack How aply romfs patch files on .3ds?

[Gow supremo]

How aply romfs patch files on .3ds?
I wanted to know some aplications for instert romfs files in .3ds files, to aply english patch with romfs folder.
Thanks,

 

[Posghetti]

I thought you just re-build the romfs (and other components) into a .3ds?

EDIT: This is also applicable to what you're asking