DARKCORP
Installing DARKCORP is not recommended due to brick potential. We highly recommend to use USB loaders (or even Disc based loaders) instead.
DARKCORP (previously known as cIOSCORP, and unofficially as "cIOSPAGHETTI") is an application that allows you to play backups from the disc channel, without a modchip. Note that the games will still run at 3x speed instead of 6x (originals).
The theory behind DARKCORP is quite simple: If you want to run a backup, you need a cIOS to do so. So basically, all what DARKCORP does is to replace most of your IOS by cIOS. So, whatever cIOS the game needs, it will always be there!
WARNING
The steps below are dangerous to do and can permanently brick your Wii. Be sure that you fully understand what you are doing!
Required
An SD card (Best results are with non-SDHC cards, SDHC will only work on 4.0 or above) or USB device formatted to FAT(32).
A cIOS Installed
Links
We cannot provide you with direct links to the needed files for DARKCORP v1.1 Full (aka. cIOSCORP 4.0) as the pack contains illegal files. So you will need to find this pack yourself somewhere.
Here's the link to the DARKCORP v1.0 Lite (no wads or extras, but legal):
http://filetrip.net/f10163-DARKCORP-1-0-Lite.html
IOS56 and IOS58 are only available in the Full version (not the Lite version).
Extras (only available in the Full version):
cmios (WiiGator)= mios v4 with WiiGator's GC Backup Launcher 0.2 embedded into it.
cmios (Waninkoko)= Waninkoko's cmios rev5, but uses mios v4 as a base, instead of mios v5.
DVDX Fix = 2 DVDX wads (titles DVDX and DISC) that run under cIOS249 in case DVDX stops working afterwards.
Result
You can run backups from the disc channel.
Risk level
HIGH - Brick protection required
Guide
Computer ----------------------
1. Not much to do here... just extract the DARKCORP pack to your SD card, so that the Homebrew channel can access it.
Wii ----------------------
2. Go to the Homebrew channel and run the DARKCORP installer. Once its done, it will return to the HBC...
3. If you want, you can run the other two included installers too. These will give you GC Backup launching (from disc channel) and DVDx (if you don't have it yet).