The wii mod is not a hardware update, it's to trick the system or in other words bypass the seceryty check of the disk. To make this simpler research on how a mod chip works and what's really on the so call CHIP of these MOD chips, you'll find it that it's not a hardware at all. It's more of a onboad bootup disk then a hardware. I could get tech. here but it's a waste of time to write and explain how programing works as it relates to hardware. The funny thing about all this reading disk backwards and stuff is that it doesn't really matter. What matters is how data is written/press onto the DVD. Hell a computer DVD drive does not read backwards but do explain how it is able to read a Wii disk? Oh yeah did I forget, the DVD enable Gamecube is an exact copy but with a larger DVD insert plus DVD software installed (stated by NIntendo plus panasonic) Like I said before if you know anything about programming or how hardware works it's pretty simple.