Today this problem can be solved with some extra configuration for
wiiflow lite v5.4.8, however, if you don't want complications,
CFG-USB-Loader loads it without problem.
For wiiflow lite, I did the following ...
In general configuration:
Startup Settings -> Force cIOS load -> On
In game specific settings (Just Dance 2)
cIOS -> 250 (d2x v10beta52 in base 56)
Language -> Default
Video Mode -> Default
Patch Country String -> Disabled
Vipatch -> off
Patch Video Modes -> None
Aspect Ratio -> Default
Hook type -> VBI
NAND emulation -> disabled
480p pixel patch -> off
regards