http://www.wiihacks.com/recommended-faqs-guides-tutorials-only/60921-guide-softmod-any-wii.html
All files needed is attached here as well:
CHAPTER 1
1. Download MMM-58-61-Hackmii_0.8_BB1.zip, Extract file to sd:\
-Go to wii settings- data managment- channels- SD- Load the boot.dol
-Multi-Mod Manager will load
-Select Wad Manager -Press A
-Press 1, -Press A -Install all Wads
-IOS58 and IOS61 will install
-Press "any button"
-Press 2- load "App Manager"
-Select hackmii_installer_v0.8 -Press A
Hackmii Installer Loads
1. Part 2- Install The HomeBrew Channel and Bootmii
Read the Scam warning and press 1
It may take a minute or two for the "press 1" to appear- be patient
Install the HomeBrew Channel
Install Bootmii as Boot2(boot2 may not be available, IOS installs automatically)
Prepare the SD-card
If Step1 fails with error "no vulnerable ios",
DO THIS
CHAPTER 2
CHAPTER 3
Url to this pages:
http://nade.dk/web/nade/site.nsf/FramesetHP?readform&wmain=files/Softmod_Any_Wii