How about this trick : "NOTE: Make sure to patch to PAL with regionfrii. Thats the only way to make it work, else green screen. 30 sec load time. "
EDIT: http://gbatemp.net/index.php?showtopic=106044&st=0
"I finally got it runnig by simply using waninkoko's WiiFrii 2.3b for region patching...