.j2a - Everything's already ripped
.j2b - Done by Dr Eggman
.j2e - there's already a program for that
.j2h - highscores, right? why would you want to?
.j2i - it's just a text file with an IP address in it
.j2t - Ice M A N confirmed he figured out the format already
.j2v - ddflc
.j2m - JJ2 can do that itself

That leaves .j2d, which Ice M A N was already making progress on, right? Then someone only needs to integrate it all into one program