Hi, same problem here >_<
I have a Wii with 4.0E and I can't boot games with Hermes' cIOS, I get black screen and have to hard reset...
I used Bannerbomb to load HackMii installer to install HBC, then I downgraded IOS35 with CMDVDX34 and installed with WAD Manager IOS35-64-v1040, cIOS 249 rev...