Cannot get Mario Party 7 to work!

I cannot figure out for the life of me what the HECK I'm doing wrong. First of all, yes, I do own Mario Party 7, but the disc is scratched, and I can't really play my original disc anymore. That's why I'm going nuts trying to play my game via backup disc or usb right now! Aside from Donkey Kong Country Returns, this is the only other game I've ever had to try and play a back up of, and Donkey Kong Country Returns worked fine.

Since I can't play my original disc of Mario Party 7 (well, I can play it...but it gives me errors all the time because it's scratched), I'm trying to play it with a backup disc or load it via USB. I've been following all the guides on here, but nothing seems to be working for me. I've tried playing the game via Neogamma, USB GX, and CFG USB loader.

Here's what happening with each of the three things I've tried:

- Neogamma gives me a green screen, and then restarts the Wii.
- USB GX doesn't show my game (though it could be I don't know how to use USB GX). However, the USB stick does show up in the settings menu while I was poking around, so I know it's formatted okay. Is there something I'm suppose to be doing to get my game on the USB to show up?
- CFB USB loader says I have to install a custom 248 IOS or something?

If anyone can help me get Mario Party 7 working, I would love you forever! Please help me!