How can I install ocarina without all these errors?

It's on my sd card but it tells me it's not a valid wii application. I heard online that you can only run it through gecko, but I have no idea how to do that, no one says how. Can someone help me out, I need custom brawl textures and music!

use gecko OS it has ocarina in it and is more updated

Gecko OS has an options menu which lets you turn cheats on or off.