OK- What part of the tune editor refers to headers and their "tuning"?

Hello- I've just loaded the full version onto my 08' NC. HOW DO I TAKE FULL ADVANTAGE OF v tUNE WITH REGARDS TO THE AFTERMARKET HEADER (gwn)? When i registed the car prior to and during the purchase it was asked what mods i'd done to the car and i listed the header and K&N filter. All i can view...