So what do these tools actually do? Just let you compress data with a decent encoder? Resize (change the data rate, actually) images and sounds? Cut out extra junk like updates and support for other languages? I know that some optimizing tools for OS install discs will make multiple copies of the same file be reduced to just one copy with all the files pointing to the exact same real spot on the disc. However, I seriously doubt this last one would help on Wii games.