They do a series of three tests (though one is optional), first is a side impact crash, where a weight is rammed into the side of the vehicle at 50kmh. The second is an offset frontal collision, where the car hits a block with the front of the car, but only one side (drivers). That's done at 64kmh. Last test, the optional one, is the vehicle sliding sideways into a pole at 29kmh.
Things like brakes don't change what happens in a collision, they may change how likely you are to get into a collision and at what speed, but these tests are all done at the same speeds so that wouldn't change anything. Things like airbag levels in the Ghia certainly would, they just use the standard Focus for its test results, which cover the CL to the Zetec, as they all have the same safety equipment being tested.
It measures injury to the head, neck, chest, abdomen, pelvis, upper and lower legs and the deformation of the vehicles structure.
That's about all the information it has here... it's not a massive brochure, only three little diagrams, no pictures even!
Just thought it was an interesting 5 minute read. Not like there's much we can do about the results now anyway