a question for you can i instal a dvd video plaier in my mazda 3 with stock 7" screen i want to see a fil o with a tv turner i want to see the tv can i?there is an IN VIDEO=? i think that the navigation systen is a kennwood and the monitor too can i istall a dvd player or a tv turner?or i maust change all to do this?thank exuseme for my english but i'm italian thx for all