320562 Magento Custom Order Status

I need this doing quickly but I need it doing well without problems. PLEASE MAKE SURE THE LEAD TIME YOU STATE IS THE CORRECT LEAD TIME. I AM AVAILABLE VIA IM, PHONE FOR TESTING, CHECKING AT ALL TIMES. I require this module to be setup on your own version of magento first. Once I have tested then moved to my website. The following script or a clone version of it will be used to manage stock coming in. [login to view URL] so I dont know if this will affect the workings of this task. Once an order has been confirmed that stock is available to complete it must then go through a series of order status changes (during a 2 week period we build the order so the customer needs to know the status changes and we can see what department it's with) an example of the status but not the full list.. Stages before this should work as normal through magento. All Parts Picked (this means the order has all stock available to build – at this point we would then scan orders with the following status levels. Building Started (the product is being built) Building Finished (the product has been built and now in a testing queue) Testing Started (testing has now started) Testing Finished (testing finished and it's in a queue to be packed) Packing Started (packing started) Packing Finished (packing finished and being dispatched) Invoiced & Shipped (product completed, order shipped) this stage is handled by magento not by this script/changes you are making. We need an option to be able to assign a serial number to each order. This just needs to be a field where we type the number in. It must check if the number has been used before and not allow. This should be stored order, invoice and be seen in admin and front end. We need to be able to login as a specific user to process these order status changes by “order serial number” so for example, we log in, we click a link “scan order testing started” when we click this it asks for serial number of order, we type that in, we click go the order status is changed to “testing started” the customer is emailed and the status, date, time are logged on the order for the customer under the account comments section. It needs to support any number of status levels in any order. I need to be able to add more status levels. Each status change must send an email to the customer. I need to be able to edit these in magento and log it in the orders activity log and be seen via front end and backend the current status. The orders can change status in random order and multiple times for the same one. I need to be able to enter the serial number to be able to view the order so it should be linked into magentos normal search fields.