Thanks to all who have offered suggestions. However, the problem remains: with the GeForce2 video card installed in my Cube (OS X v.10.2.3), neither the DVD Player app in the OS 9.2.2 volume, nor the DVD Player app in the OS X –> Applications folder, will launch. It appears that I have all the current extensions installed, as per your suggestions. No other apps appear to be adversely affected by the GeForce2 card. Here's the latest… I installed the GeForce2 card, and then re-ran the OSXUpdate10.2.3 – no change. I have searched Apple's web site, but cannot find either a DVD Player v.3.2, or an INSTALLER for DVD Player v.3.1.1. The only app I can find is an UPDATER for DVD Player v.3.1.1. And it does not enable my DVD Player app. In fairness, my DVD Player app (OS X) does not run with the stock ATI RagePro card, either. But at least I can play a DVD under OS 9.2.2, using the OS-9 version of the app. Perhaps someone can send me a Stuffed copy of DVD Player v.3.2. Better if someone has an INSTALLER for DVD Player v.3.2. Thanks in advance. -- Digitally Yours, John H. Lincoln Digital Media Designer Fornalutx, Mallorca, Spain