rasdori, it does mention that a Mod-Chip is needed. Infact he mentioned that he used a DriveKey.
Regarding not having the trucha bug installed in 3.4 and above issue that prevents unbrick disks from running. I found a post that mentioned filling up your memory blocks with as many possible savegames. When full you'll be prompted to clear up some space and the Wii takes you to the data management screen. From here you can run hacks if you like. I don't have the link but it was discovered by Souls/Dbgtgoten