I'm stuck on chapter 6. It just hangs when I start the chapter. Tried both on vWii and Dolphin.
My vWii is configured according to this guide:
Find another PAL version of this game. Go through the cutscene of chapter 6. When you gain control at the base, save it. Load it using this undub wbfs. Voila!
Long term solution:
It might be possible to encounter this problem on the next chapters. I suggest to simply use the original PAL version. I noticed that the undub voice acting is only present on cutscenes (which is only a few). If you want to watch the undub cutscenes, you can find remastered ones on youtube.