Quoted from Zablon:And I suppose there's no way they'll open up the code to let someone homebrew a real version :/
Looks like it is using a p3 p-roc so it should be fully user programmable technically. That being said, that would be a very time consuming undertaking since you would have to redo all assets if you can't extract them from the pc or whatever they are using as their head unit.
That would be indeed a cool project for somebody who has the time and determination.