Wordpress based ordering system

Hello all, Client is a small, charity based PC computer refurbisher, looking for someone to: 1) Install WP Theme 2) Do small amount of modifications; change logo, adjust header, possibly few more minor changes to a theme 3) Install and adjust e-commerce plugin Website will be used for clients and other charity programs to login and order refurbished computers from us, so it needs to have following: Home page needs to have login: usename password 1) We need to be able to create different accounts so we can track where the orders are coming from 2) Ability for clients to upgrade computer if they choose so, similar to Apple store (or any other store that allows you to customize your order) [login to view URL] You will receive WP theme, PSD design for it will all the changes highlighted. Thank you and looking forward hearing back from you!