Ultimix

Looking to get the new ES 300 and I am thinking about getting the Navigation system with the Mark L. upgraded sound -

Has anybody figured out how to put a regular DVD into the player?? Or does the screen have an input to add a DVD player??

Should I think about getting the regular system and putting the screen and DVD in after I purchase the car and if so - which systems fits etc..

Just wanting to know what some people have done

thanks

Mark