In the root of SD I copied:
cBoot2 files ("bootmii" folder and "startup.elf" file)
wiimod files ("boot.dol", "boot.elf", "icon.png", "meta.xml", "changelog.txt", "database.txt", and "wiimod.txt")
BootMii-IOS254-v31338.wad
*From main menu I select Change IOS
*Then I select ios 254
*Wii feezes...