FS Toolbox is a NAND browser that can dump files from the nand to sd card and write files from sd card to the nand, with this you can edit files on the nand to test stuff out and to have backups of your files if something ever goes wrong.

A new function is that you can set the pointer onto a TMD file in the selected title id and then press 2, you will be able to select the IOS version the channel uses and fakesign it after that.

http://wiibrew.org/wiki/FSToolbox