custom VTIGER for feild dispatch

Project Description: customize vtiger to suit the needs for a field service application, in detail I need these modules to be included in vtiger. 1.) work order with elements such as work order status (new,assigned,waiting,in progress, complete, closed, re opened. and time control (acknowledged, accepted, rejected, travel, working, completed) and work order category (repair, customization,maintenace,technical support,training,handover) 2.) warehousing such as central warehouse, vehicle storage, agent storage. 3.) Dispatcher function such as receive customer call - initiate new work order - assign work order to field service technician 4.) reporting on technician performance, service events caused by product or customer 5) Custom proposals page for maintenance contracts