Hacking Trucha Signer error message

[MediaDesign]

Hey, really need help figuring out this error:
Error decrypting data

When I try to open my Wii ISO file, I get this message. I'm trying to add custom songs to my Guitar Hero game, and this program I'm using to take the songs and replace them. I found out there was another program called WiiScrubber, but that only allowed me to download the files from the ISO, but not replace them.

I've googled for hours on this but there is really no help available, thanks if anyone can actually help me.

Ben.

 

[kedest]

you need the key.bin file, search it with google

 

[MediaDesign]

Yeah I have it, but..

holy crap! I just took a wild guess and I got it working

Nevermind, thanks anyway