If you want to run WADS on 3.4, I would strongly recommend running the wads via Homebrew channel or WADS verified to work (no banner bricks etc).......... at present there is NO WAY to recover a bricked wii from 3.4
It can be done but again I say... "
I wouldn't
"
Here's how to do it
1) put wadmanager 1.3 in apps
2) put IOS16-64-v257-prod.wad in the folder .WAD -- google it , its pretty easy to find ..
3) run wadmanager 1.3 and install the ios16.wad
4) put wadmanagerios16 under apps - google wadmanagerios16 .. also easy to find.
5) run wadmanager16 and install cios249 rev7 .. now go back to wadmanger 1.3 and it will work just fine.