To customize the affiliate Sign up form with your own fields, follow the steps below:      

  1. Login to the affiliate admin area and Click "Setup".

2.  Click on “Setup Software” and click on the link says "I want to set up sign-up page to register new user".

  1. At this page you can Put new logo or modify form accordingly. 

  1. On this same page you will see second Option button beside Form Details which is  "Form Fields" you can click on it and  can modify or delete the existing fields or click the “Add New Field” button at the top to add a new field.