I did the hack for my MZ-R500, its so awesome. I did notice two interestings things about it. I titled some of my disc in katakana, then when I put the same disc in my home deck and edit the title, my deck will scroll through all of the katakana characters available even though katakana titling is not possible on my home deck. Also when I put the same disc in my old MZ-E40 it displays the titles in romanized form like this ^MIKADO^ instead of the katakana characters. Also I wish of a way to title with kanji, as Japanese uses a combination of them both.