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:

Changes Skin/language dynamically as you move between the options.
Monochrome/Green Skin Skin improved by a new skin option in the skins XML file: maindecl and dialogdecl. These values allow for the display of a textual border around the monochrome/green screen skins constructed using the Pipe(|) and Minus (-) character
Further changes to resolve the reported sporadic crashes whilst changing language/skins from the settings menu.

http://wiibrew.org/wiki/BootMii_Configuration_Editor