It's a small piece of software that enables you to patch an Iso file before you burn it.

A Wii DVD consists of 3 partitions, one of them is the update.

The WBB modifies these partitions and replaces one of them without any update.

You just have to choose your Iso file, and click Patch, it only takes 30sec... 

After that you can burn your Iso and the game will launch without an update so you will be able to play your import game.