I have the PAL version running on my NTSC 3.2 Wii. I have Cios 249 rev9 with GX loader v600ish and Force NTSC. Strangely though I have 002 fix set to Anti and not On. (On gave a black screen).
Also of note I have the generic 36US$ GH3 Guitar from Dealextreme working no problem with this.
Also of note I have the generic 36US$ GH3 Guitar from Dealextreme working no problem with this.