I found this over on ModularFords.com. It contains a lot of good information on chips and PCM reflashes.
http://www.modularfords.com/forums/showthread.php?s=&threadid=3583
If this has already been posted; I apologize.
http://www.modularfords.com/forums/showthread.php?s=&threadid=3583
If this has already been posted; I apologize.