Wii 4.0u playing newer games
I first got a 4.0u Wii in mid-2009 and shortly thereafter managed to install the homebrew channel. Everything's worked great: emulators run well, Galaxy & Brawl run just fine and I'm able to run other apps (such as mp4 players, etc.). I figured I had nothing to worry about, especially since I was never planning on getting a single Wii game ever again.
I ended up buying Rhythm Heaven Fever on a whim tonight after falling in mad love with the GBA and DS games of the series. But unfortunately, the disc won't play unless I update my Wii. Is there any way I can get around this without actually updating my Wii? I searched around but I can't seem to find anything on 4.0u. Also, if there's any way I can play the game at all whilst maintaining the homebrew channel--even if I have to update the firmware--that would be great. All I ask is that I can keep the homebrew channel and keep the ability to play emulators.
I also apologize in advance if this is a poor first post--I'm really new at all of this, I'm surprised I even got homebrew to install in the first place!