Erm, erm... If you have FF8AC, you have to know, that menu.fs is archive, such as ZIP or RAR.
So, in this archve, you have files, and if you extract this files, you can edit them. The list of files in menu.fs you have in file menu.fl.
And now, you have some files to change texts; for example mngrp.bin or others .bin files. How edit this files? By hexeditor, for example translhextion (you must have table file). But be careful when you change texts, because you can corrupt this files (game will crash to desktop).
