THIS TUTORIAL IS WRITTEN ON 2009, AND MAYBE ALREADY OBSOLETE.
For those who use Korean Wii and cannot enter Mii and Photo Channel, like “You can’t access this channel“. Heres the solution, remember, do it on your own risk.
In my case, i found that there is multiple channel installed. Mii Channel Korean and US, Photo Channel Korean and US, News Channel Korean, US and Europe. Its not appear in Wii Channel, but we can see it through file manager. Maybe thats why you can’t access Mii and Photo Channel. I didn’t test News Channel cause i don’t have internet connection in my Wii.