This install idea is very cool but it calls for some extreme components. You will not want to be wearing out the door hinges by constantly opening and closing the door to change DVDs, so I recommend a weekly or monthly buying spree and a 300-disc changer. These are rather deep, so the 24" suddenly is not too much depth....
Ditto the CD Changer.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw