I am new to this DVD on computer stuff. I jst brought a DVD R/Burner and installed it in place of my CD/R Burner. I cannot get original DVD's to play. I keep getting msg to change screen resolution or screen color. Is there something else I need to kknow to make this work. CD's play fine and when I put a DVD in I can get the interactive stuff that comes with the DVD but the main movie won't play. Also have a seperate DVD player and want to know how to install this becuz I only have one master cable to run one player?? Any suggestions will be helpful. Thanks.