Thanks for this!! I just tested it.. I'm not sure if it's just me, but it behaves a little odd.
It does in fact fix the end of game save screen where it used to hang, and goes back to title now, but when you try to start a game again, it behaves weird, the second game will always auto select no card as soon as you start it. First game works fine, select don't continue, game over screen, second game start and no card auto gets selected. I tried it a few times to make sure it wasn't some sort of double input i was doing, but it seems tobe consistent. Little tedious to test, select the first race in the bowser cup, it's got a short timer to let run out.
Curious if anyone else has the same issue or if it's just me?
EDIT: I can confirm i get the same issue with the non JP version of the GP2, it has the same behaviour.
Also i learned if you hold tab the game goes really fast so you test much easier!