Very simple....a UASD file, which I believe will have a .usd extension, will contain data that you can use in the program for the areas you want.
This way, you have a head start in getting your 396 programmed even before you get it. Of course, you can use the program to edit this file and change it to your liking. I would make a backup copy of the file first, just to be safe.
73s Mike