Rear Entertainment System Audio

[Moheb1979]

Quick question guys

I have the rear entertainment system (1 dvd screen and player stuck in the ceiling of the car) was wondering if i can somehow get it to output to the car speakers rather than the wireless head phones?

I have a 2004 RX 330

The reason why i'm trying to do this is - believe it or not - the entertainment system can play mp3 dvds while the actual 6 cd stacker can only play audio cds and no mp3

Much appreciated!