I'm running SVT Focus front rotors and calipers right now with Warmonger's caliper brackets in back to fit the 'front' SVT rotors (new parts machined to minimum thickness). Braided lines all around.
SVT Focus front calipers fit perfectly by using longer bolts and hardened washers. I have the hardware part numbers somewhere. I'll post them when I can.
I've got the same set up, FSVT fronts and Warmonger kit in the back.
FSVT fronts with the longer bolts and hardened washers, it's not a difficult job either.