I have the same problem. I downloaded the Shadow Final Version by mastaklo and made all he says in the installer, but my smashbros_sound.brsar modified don't change the sonic audio. How can i do?
I use Usb loader with a NTSC version of the games.

and with usb loader u can usa hack and codes?

The difference between PAL and NTSC depend from the game or from the Wii? Because I'm PAL but i would like to use NTSC codes and hacks. If i use a NTSC SSBB with Gecko OS on a PAL Wii does it work?