Hello Wever!! Here's what I've done:
_ My will was 3.4U L66 with NEOGAMMA R6, IOS249 rev7). I didn't install it. It was already on the wii when I bought.
_Then I installed the HBC via bannerbomb cIOS38 rev14 and updated the firmware to 4.0U
http://www.mediafire.com/?jnnmxg2xmjr
_ After that...