The Wii gives you no way to control where the channels are located. However if you have a SD card, you can move thing around a bit. You can move your channels to the SD card and then move them back 1 by 1 in the order you want them. The Wii will add then right to left row by row as you add them. So you could add all your NES games followed by SNES and so on. You could also do this by deleting and then redownloading, but that would take quite awhile.