Maybe we are going about this wrong, we are looking for a code that will basically say
If MPH is > 5 then lockout x. (x being the POI or dvd or whatever)
Instead of trying to hack the drive and change that MPH limit to 200, in that same area of code there should be something along the lines of
Else Rx3 = unlock x. (Rx3 would be the equivilant to flashing your headlights 3 times or whatever the bypass will be this time)
Again, just a thought, Im thinking about this whenever i get a chance, and trying to come up with something new. Thanks for tuning in.