Below is the media release from ancap at the time the fg was originally tested. It states it achieved the result with only the dual front airbags and head/thorax airbags.
http://www.ancap.com.au/mediarelease?id=53
There was actually a bit of uproar that it was awarded 5 stars as it was previously assumed only vehicles with curtain airbags could gain the rating, however ford debunked that theory.