there are multiple ways to update. I would recommend using ModMii as it will make sure everything (cIOSs, priiloader) is up to date as well.
Just run it and start the modmii wizard. [*]Then say your wii is not a virgin. [*]After that choose that you are on 4.0 E, then say that you want to go to 4.1 (or 4.2 if you want).[*]You don't need to download any of the channels it lists, as they are not required, and probably already on your wii.[*]After that say yes to the "Would you like to download any of the following:" screen. [*]You only need to download the latest hackmii installer if your homebrew channel is below 1.0.8 (hit the home button in the homebrew channel and look in the top corner to see what version you are on). [*]Next say that you do want to download the latest cIOSs and cMIOS. [*]You don't need YAWMM, or the IOS236 installer (because you already have patched ios's). [*]And then you should also get priiloader (along with multi-mod manager & hacks.ini). [*]You don't need the extra brick protection, but you may want it. [*]Your choice on the theme.thats it, just download the files (may take a while, if it freezes start the task manager and end the process "nusd.exe"), save them to your sd card, and follow the guide modmii made (NOTE: for the "INSTALL WADS" step in the guide, instead of loading ios236, load 249 instead.)
If you dont want to do all that you could also just run DOP-Mii: http://code.google.com/p/dop-mii/downloads/list and install the system menu that you want with it (but it will only install the system menu and the one IOS required for that system menu, it wont update anything else. this will also remove preloader)
Just run it and start the modmii wizard. [*]Then say your wii is not a virgin. [*]After that choose that you are on 4.0 E, then say that you want to go to 4.1 (or 4.2 if you want).[*]You don't need to download any of the channels it lists, as they are not required, and probably already on your wii.[*]After that say yes to the "Would you like to download any of the following:" screen. [*]You only need to download the latest hackmii installer if your homebrew channel is below 1.0.8 (hit the home button in the homebrew channel and look in the top corner to see what version you are on). [*]Next say that you do want to download the latest cIOSs and cMIOS. [*]You don't need YAWMM, or the IOS236 installer (because you already have patched ios's). [*]And then you should also get priiloader (along with multi-mod manager & hacks.ini). [*]You don't need the extra brick protection, but you may want it. [*]Your choice on the theme.thats it, just download the files (may take a while, if it freezes start the task manager and end the process "nusd.exe"), save them to your sd card, and follow the guide modmii made (NOTE: for the "INSTALL WADS" step in the guide, instead of loading ios236, load 249 instead.)