@DJBarry: everyone should just put the OpenGL w/ the Vertex stream hack for Nvidia into their signature (haddockd said that on another thread 
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@Solar: you should be able to get 100% most of the time with your CPU. You most likely won't need the hack, as it's being debated as to wether it really works of not: https://code.google.com/p/dolphin-emu/issues/detail?id=6875
I should have clarified that there hasn't been any real testing of the One Piece games for a while. So while it is recommended that you use D3D for them, the OpenGL issues could have been fixed by now.
)@Solar: you should be able to get 100% most of the time with your CPU. You most likely won't need the hack, as it's being debated as to wether it really works of not: https://code.google.com/p/dolphin-emu/issues/detail?id=6875
I should have clarified that there hasn't been any real testing of the One Piece games for a while. So while it is recommended that you use D3D for them, the OpenGL issues could have been fixed by now.