Keysol,
You can accomplish this by doing the following:
1. Define the fields as Text or Numeric.
2. Create a script that will set default values in the
fields
3. Place the new fields on your layout.
4. Add a step to the script that launch the layout which
will execute the script created in step 2.
I hope this will help. If not, let me know and I will take
another look.
jware