Hey guys, I've been using the M3 Real firmware for a few months now after getting it and I love it. Recently though I heard there was an unofficial English version of Sakura and I just had to try it. Installed it on my Real card and everything works perfectly. One thing I'm wondering of though are the .cht and .opt files in my NDS folder. When I read an article on Sakura a while back it said the only game file changes were going to be the new .sav files, so it comes as a surprise to find two new extensions outta' the blue. Not a real cause for concern but I'm curious as to what these files do. Any enlightenment would be appreciated, thanks!