Customize customer form from a custom app

Hi all,

My question is similar to those two other question:

I customized the customer form adding a few fields through the developer menu, I would like to persist those changes inside a custom module.

What I’m trying to do is the following, I want to create a simple module that add some fields to customer, product and sales order that are specific to Brazil, I know that I can customize through the system but doing everytime I need a new database for test it’ll be difficult.

You need to do export-fixtures.
Please refer