I am not sure FORScan can activate remote start or not. If it can, you can save a trip to a Ford Dealer. If you have a laptop (will not work with smartphone app) and a ELM327 OBDII adapter, bluetooth, wifi or USB, then you can get the FORScan "license" and activate it yourself. Check some of the F150 Forums. Many of them use FORScan and have write ups on various programmable parameters. Check this forum Fusion forum
http://www.2gfusions.net/showthread.php?tid=4573
If FORScan can not, then...
I can see paying a Ford dealer a 1/2 hour shop time to activate the remote start as they do need to pay for their IDS license. It should only take 10 minutes max to turn on remote start.
Do you have two keys with your truck that start the truck? If so, you can program the fob keys yourself. All you need is to have a locksmith cut them and then you follow the steps in your owner's manual.
(I would use locksmith to cut the keys as they are better skilled than other places at cutting a key such as the local hardware store or Wal Mart or etc.)
Programming a Spare Key
Note:You can program a maximum of eight coded keys to your vehicle. Only four of these can be integrated keyhead transmitters. You can program your own integrated keyhead transmitter or standard SecuriLock coded keys to your vehicle. This procedure will program both the engine immobilizer keycode and the remote entry portion of the remote control to your vehicle.
I would have the remote start activated and then cut the keys and program them myself.
Only use integrated keyhead transmitters or standard SecuriLock keys.
You must have two previously programmed coded keys and the new unprogrammed key readily accessible. See
an authorized dealer to have the spare key programmed if two previously programmed coded keys are not available.
Read and understand the entire procedure before you begin.
1. Insert the first previously programmed coded key into the ignition.
2. Switch the ignition from off to on. Keep the ignition on for at least three seconds, but no more than 10 seconds.
3. Switch the ignition off and remove the first coded key from the ignition.
4. After three seconds but within 10 seconds of switching the ignition off, insert the second previously coded key
into the ignition.
5. Switch the ignition from off to on. Keep the ignition on for at least three seconds, but no more than 10 seconds.
6. Switch the ignition off and remove the second previously programmed coded key from the ignition.
7. After three seconds but within 10 seconds of switching the ignition off and removing the previously
programmed coded key, insert the new unprogrammed key into the ignition.
8. Switch the ignition from off to on. Keep the ignition on for at least six seconds until you hear the door locks cycle.
9. Remove the newly programmed coded key from the ignition.
The key will start the engine if programming is successful. You can operate the remote entry system if the new
key is an integrated keyhead transmitter. If programming was not successful, wait 20 seconds and repeat Steps 1 through 8.
If you are still unsuccessful, take your vehicle to an authorized dealer.