Thanks for your question. Happy to help.
When the PFC comes out of the "heavily modified" car, I would suggest you don't install this, as it would be using the same tune. (which could be dangerous if he's got increased timing, cam adjustments, injector duty etc).
Your best idea would be to take the PFC with you to your tuner and get him to install it...Takes around 5 minutes max. Very easy.
He (or she), will be able to do this for you.
Also, for my info....where are you looking to tune? My money is on Matty Spry.
Cheers and good luck.
Chris