hey heronaldo, welcome to the forums... dvd can be played on the stock screen with a nav tv unit that's plug & play, check out navtv.com
How do you get your DVD to play in the original FX screen?
Do you have any problem with the JL amp when you turn the volume high the amp goes into protection mode? Are you using the high or level level input for the amp ?
Holux GPS Iguidance 3.0
7" Xenarc Touch Screen
Carnetix 1900 Power Supplied, Wireless b/g