Pokemon Black and White 2 - Pokesav

Is there some new kind of pokesav for these games?
Whenever I try to modify my BW2 sav file with the old BW pokesav, it tells me in-game that the save file is corrupted.
Any thoughts?

havent tried it but some are saying pokegen is working: http://projectpokemon.org/forums/showthread.php?6424-Download-link-and-information

Use Pokegen from Codr. v.3.1.2 and above has been suited for use on Pokemon Black 2 and White 2.
Make sure that you have made a save file by saving in-game. You can edit most common save file types such as .sav, .dst, .ds, .duc. without having to convert it. Of cause other extension type will need converting.