Wordpress plugin modification

I have a WordPress bulk ordering form system on my site. I want some modifications on it. below are the changes I want on my website. Here is a link of my page: [login to view URL] Website changes needed: While staying on the bulk ordering page Once a product is added to cart it should show under or next to quantity box that how many of these items are added into your cart. Customers should be able to change base color (Gold/Silver/Bright White) Customers should be able to choose different colors (I should be given an option to add colors from the back end) Customers should be given a small text box with each product so they can tell further requirements for their products Add to cart button should be changed to Add to order. Once a customer adds a product to their order with specific colours he chosen he should be able to add same product to his order again with a different colour and specs Product table may be a bit bigger in height so all the above information can fit in nicely customers should have a go to cart and checkout button at the bottom of each page customer should be able to place order without making any payment It should create a nice invoice for customers Customers should be able to download a pdf version of their invoice After placing their order on invoice page customers should be told payment method is wester union or bank transfer or any other payment method, they prefer (I should be able to change this information from back end) If pdf invoice is not possible customer should be able to download some sort of proper invoice with all items quantity and prices and total prices mentioned and how to make payment etc. (I should be able to modify payment request information or add more information from back end) If customers places an order they should be given a designated area where they should be able to track the progress of their order Order progress should be such as; order placed, order confirmed, payment received, order started, order ready, order shipped, order delivered and order completed. Every time order progress is changed it should mention date. I should be able to change order status from my back end. I should also be able to undo order status. Every time order status changes customers and I should get emails. Order progress map maybe should go from top to bottom. It should have a nice user interface so customer can see and follow it clearly and easily. This plugin is already installed on my website. You only need to modify it to make it more suitable for me Further changes will be given if work is done on good standard.