@Phanton
Hey I just registered to warn you, DO NOT TRY TO EDIT YOUR SAVE with Mario Kart unless you know your method works 100%
I attempted to do this with tubehax, I backed up my savefile first of course and then tried to replace it, the replacement did not work and Mario Kart wiped out everything I had instead.
Now since I backed everything up I was calm, after re-importing the original savefiles, it seems mariokart refuses to take even my original save and Im left and forced to start with nothing all over again. Hope this helped.
Edit: Quoting didn't work, cool.