I'm just copy and pasting this from another conversation I had. Hopefully it helps. I helped my friend get these codes running from, *i believe*, a fresh softmod so try following these instructions. This is assuming you are trying to run the game off of an SD card, though (which you should do anyway).
Use this guide for installing IOS 236. Even if you think you already have this installed, do it again. I think the installer that InternetExplorer had bundled was not working correctly or something
http://gwht.wikidot.com/ios236
Then you need Dios Mios Lite if you are running from an SD card.
Download
this and put this "wad" folder on the root of your sd card. Inside the WAD folder contains Dios Mios Lite.
Now you need to install this Dios Mios Wad:
Download this
Wad manager homebrew app and put it in your "apps" folder on the root of your SD card. Then open this program up on your Wii and install the Dios Mios WAD
Now download
Dios-Mios-Booter and put that in your "apps" folder as well. This is what you'll use to launch the game (using the steps I noted at the bottom of the 20xx training thread to get codes working).
And if you don't have your ISO in the correct format already,
(copied from a Facebook message I sent someone)
download this program
http://www.hacksden.com/attachment.php?attachmentid=696&d=1350496227
its for your computer
the ISO has to be in a specific format on the sd card for it to read it correctly
so what you want to do
is drag your .iso file over top of that discex.exe file
and then discEX creates a folder called GALE01 (in the same location on your comp that your ISO file came from)
and then you'll want to copy that GALE01 folder to your sd card in the location:
SD:\games\
achilles1515,
Today at 9:32 AM