For Ford transponder vehicles, simply take the "chip" out of both keys.  Take the covering off the steering column and find the coil around the ingnition switch (where the key is inserted).  Now hold the "chip" against the coil in various spots until you find the exact spot it needs to be.  You don't need to keep trying to start the vehicle to test it out, just look at the red theft light in the instrument cluster and when it stays solid instead of blinking when the key is in the "on" position, then you got it.  Now hot glue or superglue the "chip"  to that spot and let it dry before putting the steering column back together.  Always test it with both keys and the remote start before reassembly.  Remember to take the "chips" out of BOTH keys or the one with the "chip" still in it will not work, the "chips" will cancel each other out and act as if there isn't one at all there.  This is the easiest, quickest, and most failsafe way to bypass the ford antitheft system.