remote programming

hi all the remote key thing you know the thing you push the button on and it opens the doors and disarms the alarm is all worn out. works if you tap it. i can buy a replacement on ebay but how do i program it. for my 1997 ford taurus with base motor.

Turn ignition key off and on 8 times fairly quickly. Leave in the on position.  The door locks should lock and unlock.  Then press either button on the remote.  The locks should work.  Good luck.