A WARNING for those editing visual.txt under Wine:
MAKE SURE THAT YOUR TEXTEDITOR CAN READ AND WRITE UTF-16 FILES! If you write visual.txt with a encoding other than UTF-16, perfect dark WILL NOT LOAD YOUR SETTINGS! Wine's Notepad will screw the file, and most console editors will fuck it too. Better stick to gedit/KWrite, and force UTF-16 when asked, or from the menus.,
Note also that you must use MS PGothic font if you want to see japanase chars! (pull it from any Wintendo box, it's a .ttc file) Linux native fonts will not work, this is a wine bug, sorry :(