Well, I have finaly got around to getting more then one remote for my truck, and I spent a little time looking online to find out how to make them work on my truck, well I came across this and was VERY helpful, and now I have three remotes insted of one (helpful since I not had key locks in my doors in like three years lol)
I found this on http://www.fordf150.net/howto/reprogramremotes.php
It is necessary to have ALL (maximum of four-original and/or new) of your remote transmitters available prior to beginning this procedure
To program the transmitters yourself:
Insert a key in the ignition and turn from 3(Off) to 4(On) eight times in rapid succession (within 10 seconds) with the eighth turn ending in the 4(On) position.
The doors will lock/unlock to confirm that programming mode has been entered.
Within 20 seconds, program a remote transmitter by pressing any button on a transmitter. The doors will lock/unlock to confirm that the remote transmitter has been programmed. (If more than 20 seconds pass before pressing a remote transmitter button, the programming mode will exit and the procedure will have to be repeated.)
Repeat the previous step to program additional remote transmitters. The doors will lock/unlock to confirm that each remote transmitter has been programmed.
When you have completed programming the remote transmitters, turn th ignition to 3(Off) or wait 20 seconds. Again the doors will lock/unlock to confirm programming has been completed.
Dunno if this helps anyone, or if I am the only one who did NOT know this lol but there it is