In 2015, APA is going to update DSM. These mere petitions can't do much difference. If you remember, the DSM version before 70's had 'Homosexuality' as disorder as well, but then they removed from the list of disorders in the later versions, converting it into 'Gender Orientation'. But for that, homosexuals had to physically protest. These days, media is much more powerful. But Media is mostly against Transgenders, as media people only sell what the majority wants to buy. People love to laugh at Transgenders.
Things can change, but for that, some struggle would be required. I just joined this forum, so don't know the activeness of this board. However, if something has to be done, it has to be done with some serious planning.
Zakfar.