Car DVD Wince 5.0 firmware development

hi i am looking fro skilled individuals who have the ability create firmware for car dvds that run wince 5.0 We import OEM Car DVDs from China, it came with Chinese OS system (it run on WINCE 5.0) We would like to develop a beautiful GUI with our specification features Developer can modify chinese firmware or create new one Car dvd have Bluetooth DVD CD SD USB Aux videos and anothers features Have somebody here can work with firmware + GUI on car dvds products