yes there is, but you will need an owners manual to read how to do it. it is
a good thing to have anyway.

Programming The Keyless Entry System

To program an alternate code:

Enter the five digit permanent entry code into keyless entry keypad.

Within five seconds of pressing last button of permanent code, press
the 1/2 button. (Factory code found on the module or elsewhere).

Enter any alternate five digit code within five seconds of pressing
1/2 button.

Enter a sixth digit as follows to indicate operator's memory seat
setting to be set by alternate code:

9/0-- no memory recall
1/2-- memory seat position 1
3/4-- memory seat position 2
5/6-- memory seat position 3

After successful programming, the doors will signal by locking and
then unlocking.

The intial sequence is also used for reprogramming the key fobs, so
try to do it away from nearby Ford vehicles.  If someone with a
Ford, Lincoln or Mercury happens to press a button on his key fob
while you are in the programming mode, his remote will open your van
while your remotes will not work anymore.  You would have to
reprogram all your keyfobs at the same time if this happens.  So
check whether your key fobs still works when you are done entering
your personal code.