Format of 4gb SD seemed to have worked...by clueo8 - BootMii Beta
Here is my setup. I have the latest BootMii beta5 and I believe I have System Menu 4.1 (if not 4.0; I can confirm if this information is relevant) and I have BootMii installed on boot2. I have two SD cards which I use for my Wii, a 4GB card (which is incompatible with BootMii) and a 2GB card (which is compatible with BootMii). If I need to boot into BootMii from startup, I'll put in the cby clueo8 - BootMii Beta