I apologize in advanced if this was answered already or if this is a stupid question. What if a buddy has an accessPort? Can he flash the custom maps on my car and will it stay ?
If your buddy has an AccessPORT and does not have it installed on his Fiesta ST or Focus ST yes you can use his AccessPORT and the maps will stay installed on your Fiesta, but your buddy will now have an accessport that he can't use.
Select AccessTuneRace/ProTune units can install tunes without a separate device, but the tune will always be married to your VIN#.
This is to ensure that to tune your car, you're going to have to buy one accessport per car to have both cars simultaneously tuned.
If your buddy has the tune installed in his car, it cannot be installed on yours. The unlock fee for an accessport is $375.