From GameBrew - a wiki dedicated to Video Game Homebrew.
- Copy wiicm apps package to SD Card.
- Create /CODES/ directory on root of SD Card.(This is where the .gct file will be written to)
File selection: Point and Click with A to select file or directory, or Home to exit. File can be named anything you want. Wiicm creates the gct file name from the first line of the txt file to account for this.
Code selection: Click code name to activate code, red light is on black light is off. Click MORE or BACK to move through code list. Press Home after finishing code selection. Finally when you see the caution warning press A to create new gct file and exit, or Home to exit without creating new gct file.
May cause crashes! Especially with long cheat files such as Super Smash Brothers Brawl. Add file wiicm.ogg to the /txtcodes/ directory on the root of SD card. Any audio file in ogg format renamed to wiicm.ogg should work. Delete this file if wiicm freezes.
Txt Code File Formating
Most code txt files downloaded with Code Downloader or directly from the WiiRD database are properly formatted.
Explanation: File must end with a hex code or commented line. No blank lines are allowed at the end of the file. The first 4 lines must be; disc code, game name; carriage return, code name. Wiicm employs blank lines/carriage returns to search for the next code name. Only one carriage return may be used to separate codes, and code name must be only one line. Comments may be placed after codes, and may be multiple lines, but cannot contain any blank lines. See readme.txt for sample
version 1.1: Max Cheats is now 500. SSBB compatible. Fixed file selector bug. Compiled with libogc 1.7.0 adds SDHC support. Fixed sound effects and changed to asndlib. Added libfreetype for logo.
Thanks: brkirch on the wiird forum for the awesome converter code.