Do these steps to get HBC and cIOS249 on your Wii

Once you have these the Wii is pretty much your oyster, and you can downgrade, use USB/DVDR loaders, Preloader etc
Make sure WiiConnect24 is off!
DO NOT TRY THIS ON AN LU64/65 MODEL
Serial Location: [Only Registered Users Can See Links. Click Here To Register]
1: Download
[Only Registered Users Can See Links. Click Here To Register] and unpack it onto root of an SD card.
2: Put the SD card in wii, go to Wii Options, than go to Data Management > channels > SD Card then you will get a message saying "Load /boot.dol?" select 'Yes' and CMDVDX34 will run, then pick "Downgrade IOS35", let it finish its job.
[Input from Zerosyko]: If you get Exception (DSI) has occurred, turn the wii off, go to the system menu, install the update from a game like Brawl or Mario Kart, and try again. I had to try probably a good 10 times.
3: Restart your Wii, take out the SD card, delete the boot.dol from the root and rename 'boot2.dol' to 'boot.dol'.
4: Put the SD card in wii, go to Wii Options, than go to Data Management > channels > SD Card then you will get a message saying "Load /boot.dol?" select 'Yes' and Wad Manager 1.4 will run, use this to install IOS35-64-v1040.wad, If it doesn't work, don't worry it is already installed.
5: Restart your wii and run wad manager 1.4 again using same method as step 4 except this time select IOS35 as the one it should use and install cIOS249 rev9.wad and HBC 1.0.1.wad.
6. Done! You now have HBC and cIOS249 so all your HB should work. If you plan on staying on 4, format your sd card, download
[Only Registered Users Can See Links. Click Here To Register] and follow instructions in the readme, if you want to downgrade follow
[Only Registered Users Can See Links. Click Here To Register] and start at 2c.
Now go read and search!!!
If you fancy the USB loader then
[Only Registered Users Can See Links. Click Here To Register]
If you are new to wii hacking read
[Only Registered Users Can See Links. Click Here To Register] and
[Only Registered Users Can See Links. Click Here To Register].
Credit to: Comex for bannerbomb and the IOS35 downgrade, Waninkoko for wad manager 1.4 and cIOS249, Team Twizzers for the HB Channel....and Nintendo for their Wii
MOST RET ERRORS CAN BE FIXED BY USING THE CIOS DOWNGRADER. GOOGLE IT.
DO NOT TRY THIS ON AN LU64/65 MODEL