This looks very interesting:
More infos can be found on the official website: http://wum.talevas.com/QUOTE said:WUM is GNU/GPL software who can help you to :
- analyse a wii game iso file (or directly the DVD on linux) and tell you :
* which is the region of the game (and other informations)
* which is the region of the update
* if there is a firmware update inside
* if there is a risk to perform this update
* if the update has already been modofied by WUM
- patch the update of this iso to :
* put an inerte update inside : function Brick Block
* replace by another update : can be use to make tests or unbrick semi-bricked wii