If the text fields are available in the FPM feeder class then all you have to do is enhance/customize the FPM application. If the text fields are not already there, you need to enhance the FPM feeder class (or create a sub-class) to add the missing text fields. Then, if you created a sub-class, you need to customize the FPM application to use the new sub-class and add the text fields.
Basically, you need to learn about FPM configuration/customization in order to be able to enhance this UI.