Thanks for the kind words. I can't continue much further though, because I don't know a word in Japanese.
With Google translate I was able to decipher the intro text and some other stuff, but there's an intermission scene where Protoman speaks to you after you beat the first four Robot Masters. I have no idea what he's saying and Google translate is way off.
I tweeted about this predicament, hoping to find someone who's fluent in Japanese and willing to help, but so far with no avail. If you know someone who likes translating in the context of ROM hacking, drop me a line at firstname.lastname@example.org