Can you update a non-modded wii from 3.4u to 4.2u via sd Memory stick?
Well, can you? Need to know cause I can't modify a wii that's a 3.4u but I have modded dozens on 4.2u.
Follow the guide Krank linked you to.
But for those curious, yes it is possible to update 3.4x to 4.2x without any homebrew. Downgrading is not possible without any homebrew, since downgrading needs a Trucha Signed iOS, and you don't have those on a virgin Wii.
Last edited by InvincibleSloth; 07-01-2010 at 10:07 PM.
Reason: Fixed some wrong spelled words :p