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Unpack the archive, inside you find 3 files
sc_music.scd
speed2_Coop_Fix
NMCA_003
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sc_music.scd goes into game installation folder:
C:\Games\THQ\Gas Powered Games\Supreme Commander - Forged Alliance\gamedata
IMPORTANT!!! AFTER YOU ARE DONE TESTING YOU NEED TO DELETE THIS FILE ELSE YOU WILL KEEP DESYNCING IN OTHER GAMES !!!


speed2_Coop_Fix goes into mods folder
C:\Users\%UserName%\Documents\My Games\Gas Powered Games\Supreme Commander Forged Alliance\Mods


NMCA_003 goes into map folder:
C:\Users\%UserName%\Documents\My Games\Gas Powered Games\Supreme Commander Forged Alliance\Maps