I don't know anyhting about what it takes to program music for nes games but what i do know is that my lifelong friend and composer Robbie Priestly would write some amazing soundtracks to some Video Games.

I have always thought he would be perfect for the job but never knew anyone who had anything to do with programing video games. I emailed him and mentioned my idea and he was more than receptive to it. He is not only a great composer but he is also a computer programer so these combined talents should help you if you find yourself needing a score for a game.

here is his website with some of his music.

http://www.virtualarcana.com/
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I think you can contact him through the website and you can mention that del sent ya.

If you need  his email pm me.