If you get a new remote or change the battery in your remote you may need to reprogram your vehicle to accept the keyless entry remote or key fob. This procedure works for a lot of 1998-2008 ford vehicles, see below for vehicles that the procedure works on and vehicles that use a slight variation on this procedure. I attempted to get this list accurate, I apologize because mistakes were probably made.
The absolute beginners guide to programming an Arduino Duemilanove for the first time. I will take you through downloading the Arduino programming software, configuring the software, writing your first program, sending it to the Arduino, and testing operation.