Add custom field in registration form

[annx10]

Hi, I was looking tutorials, manuals, reading documentation about this theme, but I only found about add custom fields to address clients.

 

I want add a new custom field in registration form, required (it would be a select whose options are from database).

 

In this tutorial, http://nemops.com/new-customer-address-fields-prestashop/#.VYAHMlKz5UM

explains how add custom fields in addresses, and at the end explains that for registration form it would be same but modifying Customer class, and relative controllers, futhermore different template files: identity.tpl and authentication.tpl, as well as order-opc-new-account.tpl.

 

I have added custom field in database, I have create other tables with information for options of select. I have done override of class Customer, AdminCustomersController, but I don't know how I must modify identity.tpl, authentication.tpl or order-opc-new-account.tpl.

 

Can anyone help me with this, please?

[annx10]

Please, I need some help.

 

Anybody?