Вот что написано в readme:

-Unzip all in a temporary folder (for example, TempD as I do at home),
-open the missions folders (Missions/Campaign/US/Pacifique for example, but you will find 5 mission folders),
and, if your FB is with english settings, make the following corrections : all the "xxx_fr.properties" must be
re-named without the "_fr" part. So, they become "xxx.properties", and you can read the briefings which are,
for the moment, only in French. VERY VERY IMPORTANT !!! DO NOT FORGET TO CORRECT THE "info_fr.properties",
making him become "info.properties"... if not, the offline campaigns will not appear in the selection pannel !!!
Also, do not forget to correct the "intro_fr.msg" in the video folder of every offline campaign. Rename it
"intro.msg".

Once these corrections are finished, just copy/paste the Missions and the PaintSchemes folders in your
IL2-Forgottten Battles !!! Nothing complicated, no ??? Do not forget the "all.ini" file. If you have no
"all.ini" file in your DE campaign folder (or in your US folder), just copy/paste it. If you already have one,
just add a new line : Pacifique (with exactly the same orthograph, please...).

Короче смысл в том чтобы имя файла info_fr....... заменить на info......... , то же самое для интро файлов. Также в папках DE и US должен находиться файл all.ini (лежит в архиве), хотя это помоему и необязательно.

P.S. А брифинги на французском... Плохо, я только энглиш чутка понимаю/:-((. Может кто переведет текстовку и сделаем русский вариант "Тихоокеанских приколов"?