my god its so much simpler than all this waninkoko update crap.
install cIOS_rev9 or higher.
update via nintendo (dont give a shit what you say, it's safer)
install cIOSCORP (the latest one with cIOS60BF.wad)
and optionally install Preloader 0.29 after installing cIOSCORP (if you do it before you'll brick, but you only need to install preloader again to fix it)
and it's safe coz you have cIOS installed, you dont miss out IOS60 and brick your wii, all you have to do is update and install cIOSCORP!!
i dont know how many times i've said that...