BootMii Configuration Editor llows you to change the values in the /bootmii/bootmii.ini file without having to take out the SD card and edit it on a PC.

Changes:

When BootMii Switch is active, a new option has been added – switch and reboot. This allows you to switch the directories around and reboot the wii immediately.
USB2.0 Support (via IOS58). Bootmii Config Editor can now launch from a USB drive, however it will still only edit INI files on the SD card. This utilises IOS58 from the HBC channel. If you don’t have IOS58 installed, you can install this using the IOS58 Installer

http://wiibrew.org/wiki/BootMii_Configuration_Editor