This is an alternative fix for those on sys menu 4 with no cios using cboot2 instaed of the ios35 downgrade trick.

1: Copy contents of 'SD Card 1' to SD card.

2: Put card in Wii and go to Data Management > channels > SD Card, then you will get a message saying "Load boot.elf? Select 'Yes'.

3: Install Bootmii v2 as an IOS.

4: Install the Homebrew Channel (unless you have it already)

5: Remove SD card and save the Bootmii installation to your PC.

6: Delete Bootmii installation off of your SD card and copy contents of 'SD Card 2' to your card.

7: Now put card back in, restart your wii ,start HBC, press home then run Bootmii.

8: The screen will be black for 10 seconds then Wad manager will run.

9: Select [B]uninstall[/B] first then install IOS249.wad.

10: Go to HB channel and run cIOS38_rev13b-Installer.

11: Go to HB channel and run IOS downgrader.

DONE!

Credit to Wiigator, Team Twizzers and Waninkoko