Since I got the game I was very curious about that unused animations files, so I started my research. And I found that these files of course works, but the game doesn’t read them in a normal way, anyway, here is a video I made showing the unused Go to Moves:
http://www.youtube.com/watch?v=xaXfCHDaKtk
I am sure some people could say: where are the other GTM´s? well, if you take a look at ea3names you will see entries like this: GTMASTOUDEMIREHOLD,sht_gotodirkstepback. Does this mean that this animation is Nowitzki´s step back shot? Yes. So, Amare, Dwight Howard,Rashard Lewis, Paul Pierce, Ron Artest, Rasheed, Shaq and Zach Randolph don´t have real Go To Moves, they only have a Copy of Dirk´s step back shot (I don´t Know why they do that…well, you never know what EA people can do...).
I also noticed looking at ea3names that should be a Tim Duncan’s turn around jumper, but I didn’t found it in his animations files; the same happens with Ginobili, he supposed to have a running jumper fading different directions but I didn´t found them in his animations files, the only GTM that work for Manu is Dirk’s step back.
Anyway I didn’t find yet a good way to use all of them in game, but I will continue with my researches. I also managed to use three point contest jump shots in a regular game not loosing GTMs, signature shot or other jumpshots, but it´s not perfect yet, because you can´t use freestyle in movement (for me is not a problem, you still can dribble in movement with spacebar, but I will try to fix this). I guess this could work to add dunk contest´s jams in a regular game, but I haven't tried it yet, I will continue investigating…