Quoted from aurearon or something
"I saw a few people asking for a very simple step by step guide on how to install VC games using the Twilight hack, and before I figured it out for myself I was one of them. So I decided to make the guide myself.
I do not claim to know very much about this, so if this doesn't work for you I appologize but I have installed over 20 VC games on 2 different Wiis flawlessly this exact way so it should work.
This guide is EXTREMELY simple and easy to understand, in fact I gave it to my 8 year old brother and he managed to perfectly install a VC title using it so if you still don't understand... well, you just might be retarded.
I have now updated this guide to V2 of the WAD Installer.
Installing Virtual Console games
Step 1: Download the following items:
The virtual console titles you would like to install
The WAD Installer V2
The Twilight hack (NOTE: You must use the Twilight hack file for your games region,
to find out which file you need go here. That page also has a download link for the
latest version of the Twilight hack.)
Step 2: Extract the .rar file that the WAD installer comes in and rename the file
'wad-installer.elf' to 'boot.elf'. You can get rid of the other files, the .elf file
is all you need.
Step 3: Connect SD Card to computer.
Step 4: If it does not already exist, make a directory called "/private/wii/title/RZDx/"
on your SD card; replace "RZDx" with RZDE, RZDP or RZDJ as appropriate for your
version of the twilight hack file.
Step 5: Rename your Twilight hack file to 'data.bin' and put it in the "private/wii/title/RZDx/"
directory on your SD Card.
Step 6: Move boot.elf to the root of your SD Card. (NOT TO THE 'private' FOLDER!)
Step 7: Extract the Virtual Console titles you downloaded if they are in .rar files.
You should get .wad files. The .wad files will probably all be named 'title.wad',
rename them to whatever you want but make sure they have different names.
Step 8: Create a folder on the root of your SD Card called 'wad' in this folder put
all the .wad files you have for all the VC games you want to install.
Step 9: Now that all the necesary files are on the SD Card we can begin. Unplug the
SD Card from the computer and plug it into the SD Card slot on the front of the Wii
(which is located next to the disc slot, behind a panel).
NOTE: If you already have a Twilight Princess save file on your wii, skip the next
section.
Step 10: Insert the Twilight Princess disc into the Wii. Start the game. After
starting the game it will ask you if you want to create a save data on your wii,
(this only happens if you don't have a Twilight Princess save data already).
Select yes and it will create a save file.
NOTE: If you already have a Twilight Princess save file on your wii that you want to
keep, back it up on an SD Card before continuing to the next step, as you will be
erasing the save data from the Wii.
Step 11: Go back to the Wii Menu, click on the Wii button in the bottom left of the
Wii Menu, go to Data Management, go to Save Data, go to Wii.
Step 12: Erase the Twilight Princess Save Data from the Wii.
Step 13: click on the SD Card tab, you will see an icon that says 'Wiibrew loader'
on it, click on it, click copy and it will copy to the Wii memory.
Step 14: Go back to the Wii Menu.
Step 15: Start Twilight Princess again, this time there will be a save file called
'Twilight Hack' and it will have all 20 hearts, load this save file.
Step 16: You will see a man standing in front of you in the game, go up to him and
speak to him. The game will immediatly freeze as you speak to him and lines of code
will appear on a black background. DO NOT BE ALARMED! THIS IS NORMAL!
Step 17: Eventually it will ask you to press the reset button on the wii, press the
button and it will begin to install the VC games.
Step 18: When it is finished it will inform you that it is going to go back to the
Wii Menu in 10 seconds and count down.
Step 19: When it reaches 0 it will either reset to the Wii Menu or the screen will
go black and the console will freeze, if this happens it DOES NOT matter, just
switch off the console and switch it back on.
Step 20: When you return to the Wii Menu you will find your brand new FREE Virtual
Console games sitting proudly in your Wii Menu. Congratz.
WARNING!!! DO NOT INSTALL MORE VC GAMES THAN YOUR WII HAS SPACE FOR!
Uninstalling Virtual Console games
To remove VC games from your Wii you must use the WAD Uninstaller program, its not
enough to simply remove them from the Wii via the Wii data management as removing
them this way leaves behind a ticket.
Using the WAD Uninstall is exactly the same as using the WAD Installer, simply
rename the WAD Uninstaller to 'boot.elf' and move it to the root of your SD card.
Then create a folder called 'wad' on the root of your SD card and in that folder put
the .wad files of all the games you want to uninstall.
Then just run the wad uninstaller using the twilight hack, the exact same way you did
with the WAD Installer.
I'm pretty sure I'm not allowed to tell you where you can get any of the files used in this guide, so sorry about that... Google is your friend.