Hey. I have problems launching Just Dance 4 using both USB Loader GX and CFG USB Loader. Setting emunand saves to full or partial, the game doesn't even run, just black screen. Using emunand saves off (default) launches the game but black screen after music download thingy, Wiimote also loses sync and can't sync to the console. My retail disc used to work before it broke. Forcing video mode to NTSC results in reading disc... stuff and Wiimote loses sync. I'm simply unable to play the game.