A2Billing Customer Portal

I would like to configure and customize A2Billing as follows: - Create a new signup page that has the look and feel of my current website - Change the customer user interface to have the look and feel of my current website - During registration / signup, allow new customers to chose a user name rather than use the one (card number or email address) assigned by a2billing. Allow customers to register a credit card so I can do auto recharge - Create a new recharge page in the customer interface for the use of all major credit cards (Amex, VISA, Mastercard, and Discover), and PayPal. It is very important that you have extensive experience with a2billing, and website development. It is also quite important that you have done something similar to this project.