I just installed HBC1.06 on my Wii 3.2U yesterday using Bannerbomb without any issues.
Try another SD with larger capacity, as you may need to back up your Wii nand, which is strongly recommended.
Is anyone familiar with former forum opg.life ? I missed the transition to the new forum over the week end (was scuba diving in the sticks with no internet connection). If anyone in touch with any members please pm me.