sorry for the posting rampage, but heres a fix for Emma and Jubilee closing the game.
just replace on entities, talents, and powerstyle. Let me know if after this fix your game still crashes. I tried it on mine and she works fine with Emma, Storm, and Iron Man, all who's powers i used to improve on Jubilee. If it doesnt im just declaring this mod broken.
edit: link removed download version two
and just for sh*ts and giggles, my save game that runs this modhttp://www.momoshare.com/file.php?file=85f1ef5682ca0763eca0cb8db3ab2040
edit: this should fix any crashing problems not related to save games, it definetly is not broken as non of my save games crash, and two previously did. the problem was that the same power names, conflicted with other characters causing the game to crash.