i have the same firmware a 4.3U but when i have to go and run the bootmii on the homebrew channel i followed to do the 4th settings the one with the gears and then to do the second option and it asks me if i want to continue i go on and it goes and says that it can not find bootmii and it is looking to boot2 and it says if i want to give up press Z button and another button right after so i didby leond - Homebrew General