Según el Modmii, hay una nueva aplicación llamada "Wilbrand" de giantpune que ha sustituido al exploit letterbomb. Funciona casi igual, metéis la mac y la región de la consola y la aplicación crea un wad que es lo que deberéis instalar.
Modmii's 6.1.0 Changelog:
Letterbomb was replaced by Wilbrand. Wilbrand was created by giantpune and he has given ModMii the unique privilege of being the first to use and share Wilbrand. Wilbrand, named after the inventor of TNT, is a discless Wii Message Board exploit, or "bomb" if you will. ModMii users will no longer need to be instructed to manually download the Letterbomb exploit; instead ModMii will prompt users for their Wii's unique MAC address and build the exploit on the fly. Unlike Letterbomb, ModMii will only require a wifi connection the first time it constructs the Wilbrand exploit. ModMii will only build the Wilbrand exploit for 4.3 system menu's; however, Wilbrand is supported on all system menu's from 3.0 to 4.3. The reason ModMii does not offer Wilbrand exploits for system menu's 3.0 - 4.2 is because bannerbomb, another discless exploit, can be used instead and it does not require knowing your Wii's MAC Address. Wilbrand is available on ModMii's Download Page 2 as well as other wizard\guide functions. A big thank you goes out to giantpune for creating Wilbrand and allowing ModMii to share it with the world.