Thank you all who responded!! i feel better now to install the update. As for the update from the game I do not know what version it is until I install. Thanks again!!
So here is my story.. I have a Wiikey on my Wii, but i have a legit copy of Mario Kart (it was a gift). It wants to update from the disc and states "this update might break your unauthorised technical modification". So the question is...Is it safe to update since it is a legit copy of Mario...