Have a look a daveduluxe's reply. You can download those semi-brick disks which contain the 3.2 system update. Then extract the system-menu wad from the iso using wiiscrubber. I think you can then install the system-menu wad using a wad manager (although this should be verified). No need for wifi or a specific game!
ah i see, that means i have to install the hombrew channel. however i was told that i would need the original version of TP and it has to be the same region as the console? e.g. JP TP for a JP wii? or does any region work? thanks.
although i do remember there was a list saying what updates were with which game but i can't find it anymore XP
oh ok thanks for all the replies, i found something called wii update manager which can replace the update on a disc with another one so i might give that a go first. isn't 3.3 the firmware that stopped tucha signed games from working though?
i guess i'll try the wii update manager first, then try the 3.2 wads to see if they work.
maikel, ah i'm upgrading my wii not downgrading XP. it's on 2.2J at the moment and i wanted to update to 3.2 XP.
3.3v2 is the one that really started messing with homebrew. I had 3.3v1 and everything works perfectly. either one works. I guess your wii is not currently homebrew enabled, right? because if it is then you could just use cIOS downgrader to update to 3.2.