*DISCLAIMER*
+If you by some chance brick your Wii during the installation process, you are the one at risk. No one at WiiRd Community shall be held responsible.
Although the chances are low, there's always the possibility.
You have been warned. Continue with caution!
+I, Goemon_guy am not the author of this application. I only wrote this guide. (And posted a... *small* compatibility list.)
This is a tutorial on how to make Gecko OS Mod work on your Wii.
You're going to need to download the packages to get it to work. The packages that you want to download are the ones that contain the Application for the HBC, and then the cMIOS installer. The Application runs off of a special cMIOS to load Gamecube games, so you're going to have to install it if you want to be able to load Gamecube games with cheats or even WiiRd.
So, once you have downloaded them, put them into the applications folder on the root of your SD Card. The folder that the HBC gets all of your apps from.
The folder layout should look like this.
SD:/apps/Gecko OS Mod/boot.dol
SD:/apps/Gecko OS Mod/meta.xml
SD:/apps/Gecko OS Mod/icon.png
What you will have to do next is install the cMIOS. Use the cMIOS installer included, and make sure to patch it for homebrew.
I would download the MIOS v4 straight from the NUS servers. To do so, you will have to hit right or left until you get to Download from NUS. In order to do this, you need a valid internet connection to your Wii.
Of course, you could easily also get the MIOS by using the NUS downloader to download it from the servers from your PC, or some other method. The wad that you obtain from 'this method' will have to be in on the root of the SD card.
Now then, install the cMIOS, and make sure you have the Patch for homebrew set to "yes" so that it will be compatible with Gecko OS Mod.
Return to the Homebrew Channel.
Now you're going to have to go and download something called the Trucha Bug Restorer. This is to restore the Trucha Bug to the IOS36. When you go to download it, get the most recent version. As of August 12th 2011, the latest version is 1.14. (DOWNLOAD)
With this Wii application, you can restore the Trucha Bug to IOS36.
Make sure all patches are applied when you are installing it. (There are four [4] in total!)
When it asks you where you want to install it, make it install it to IOS236. With it in that slot, you will be able to use the rebooter with the Gecko OS Mod.
(To verify whether this was done correctly or not, load Gecko OS Mod, it should say that IOS236 is loaded.)
OK, so now that that is over with, you can now load the Gecko OS Mod, and use the Gamecube cheats with it. With that said, go into the Gecko OS Mod from the Homebrew Channel or some method to load Homebrew.
You can go into options, and go to Ocarina/WiiRd settings, and enable Debugger and Cheats for both Wii and GC. Then, for the GC hook, set it to VI. That is the only hook that is even possible.
Now, you can use codes on your Gamecube games, and if you have a USB Gecko, you can use WiiRd on them!
Some games are simply incompatible at the moment. Some games will either not boot, not load codes properly, or even debug properly!
It is also worth noting that Gecko OS Mod is not capable, (and will most likely NEVER be capable,) of running backup games. (Burned, non-retail games.)
Support game developpers and buy their software!
DOWNLOAD LINKS
Gecko OS Mod 1.92
http://www.mediafire.com/?pf5vo5hks9of2emcMIOS Installer 0.2
http://www.mediafire.com/?eyhkcutjhdzTrucha Bug Restorer 1.14
http://www.mediafire.com/?xkp8oplvcal545f