Most files can be replaced with the File Patch Code. However, sound hacks can only be done by making a custom ISO, or with Riivolution.
And check if your USB loader supports Ocarina, as you'll need it to run codes.
Most loaders do support Ocarina, but you may have to turn in on in Settings.
Ok I see so I use file patch for regular brawl files and wiiscrubber for brsar sfx?