Before you begin:
-Unzip wwpacker to C: or whatever letter your root hard drive is (to reduce the possibility of errors)
-Place common-key.bin in the wwpacker folder
-Unzip GenericWiiPatcher and paste a copy to the wwpacker folder
-Place an unzipped copy of your wad into the wwpacker folder
How to crack:
1. Drag the wad to the file named _wwunpacker.bat. When the program is finished, press any key to close the window.
2. Drag the whole folder the program produced to the file named _wwpacker-IOS35-Plus.bat.
3. When asked to patch the .dol file, press 0. After it finishes, press any key.
4. For the next option (Video Mode Changer), press A then enter. If converting to PAL, choose option 1, if not, choose 2, then press enter. Press any key to continue.
5. Now it should have the option to patch the .dol file with Generic Wii Patcher. Leaving the DOS window open, go to your wwpacker folder and open GenericWiiPatcher.exe.
*5a. Under GWP, press open and go to your wwpacker folder. The folder of the unpacked wad should be the only one to select if you didn't unpack any other wads there. Open it, select the .dol file, and press open.
*5b. The only options you need to use with this are the Error001-Fix and the Country Strings. DO NOT TOUCH ANYTHING ELSE!
*5c. Under Error001-Fix, press Search, then Press Remove 001. Under Country Strings, select the country of your choice, then press Patch Strings. Press Save. Close Generic Wii Patcher.
6. Press the DOS window so it has the focus again. Press any key to repack the wad. Press any key again to close the window.
7. Rename your new wad whatever you want, use Wad Installer/Manager to install on your Wii, and enjoy your new game
Note that this is explaining how to crack a Japanese game. You will have to use a different setting for step 3 if you're using a game from another region. It should all work the same.