To resurrect this thread a lil bit. I'm also having the same troubles as the OP.
I've tried looking for a WBS version of the game and either i'm stupid and can't find it, or somehow in the month since this was figured out they got removed.
I would prefer not to have to clean install my dolphin because I'm nearly done with Path of Radiance and would really like to convert my save over. Unless I can somehow save my progress? I know that Dolphin can see the game, just not sure how to proceed from here.