A tuner can remove that. There is an excellent chance that you could go to Ford, next time you are in for service and (a 12 pack helps grease the skids, quite well, in my experience) tell them you are taking the car to the track. Can they please remove the software speed limiter? Your car is not in warranty so they don't care about that. Unless they can't, physically do it, I would think there would not be a problem.
They might make you sign a form saying you are going to race the car to absolve them of any liability.
You, of course, will sign the form.
__________________ 2006 Black, GT, spoiler delete, IUP, five speed, leather, custom welded straight pipes with resonators, Saleen short-shift adapter, sequential turn signals, custom anodized aluminum Longacre ventilated shift sphere. Spydershaft one piece aluminum driveshaft, w/ Spicer 1330 U-joints, Steeda UCA and LCAs. bye bye wheel hop, hello traction! SCT XCalII, BBK CAI.
*I hope to die peacefully, in my sleep, like my grandfather. Not screaming in terror, like his passengers.* | 
Regulator question 
