Basics:  The French have a difficult task.  They are stripped of their only valuable territory in the first attack and can lose almost everything with out hardly firing a shot.  The French job is to help Britain control Africa, so that Britain can focus on beggining an offensive on Europe.  Also, do not give anything up in the Pacific.  Make Japan work hard for those extra IPC's.

French Tiger
By General Beutin

    The French can benefit from their Dutch colonies in a magnificent way.  Save your money for the first turn and on the second turn purchase a factory and place it in the Dutch East Indies.  Use this factory to create a French empire in the Pacific, thus creating a serious problem for the Japanese, that they ignore at their own peril.  Even if they destroy you, you will most likely raw enough strength out of them by spreading them out that your US allies can put the screws to the Japanese.