I'm totally new to all of this and need help!

My system upgraded to 4.1e and now I've lost functionality to run GC games and backups from outside of my region.

So, I decided to follow the hack to get some homebrew on my system and now I cant see the settings option - just a black screen with music.

The only things I did was follow all instructions - then I put the 4.2 safe update on for the shop channel and new Opera browser wads.

Can you help?