I have one more question too....

Is there any way to tell if the car is ready for keyless entry? I know that the car has the little alarm light on the dash. The previous owner said that it didnt come with keyless, and I have the original window sticker and it doesnt say it on here anywhere.

So, if it isnt already on my car, would I be better off just buying a basic one from a shop or Best Buy, or is there a Ford one that would be easier and cheaper?