For those of you that are interested, I've made a model of the Batwing myself in LDD. More info about my project and how to get the instructions can be found on my flickr account https://www.flickr.com/photos/125208843@N06/14359185664/.
The main difference from the one of Brickmasta is that I made it exactly as in the movie and videogame, even if this means it's not stable at all and some pieces are floating. Each piece (visible) is the same as in the movie.
Here is a picture of my model:
I hope this helps some of you that want to build it themselves. Please let me know if you find some details that I missed or that are different from the movie so that I can update my model.
I want to give credit to Brickmasta for the project he did, it helped me a lot to get the informations I needed to get started (some screenshots, the videogame footage, etc.). Thanks to him I knew this could be done. Thanks Stefan! :D