.ff file edit? how to same character for all maps?

[mandos]

I want to have in all the maps the same faction
gign or sas only in allies faction in all maps

I tried ffviewer for open .ff files and edit mp_mapname.gsc but no work

example other cod mp_mapname.gsc:

game["allies"] = "marines";
game["axis"] = "japanese";
game["attackers"] = "allies";
game["defenders"] = "axis";
game["allies_soldiertype"] = "pacific";
game["axis_soldiertype"] = "pacific";

Any idea?

thx