how to use a portable dvd player screen as a pc moniter?

first i dont want to use the whole thing.dvd dosnt work want to remove the 8 inch screen and use it by itself.is it possible to use the parts od the dvd to power the screenwith the battery and /or electric charger.or is it possible to some how use the power from a usb and the pc.how would i connect the rgb cable from the computer or is ther n rgb to composite cable(yellow)video wire.etc.etc.etc.
if you know how please fill in the etceteras on any info i dindt think to ask for.thanks.