wolf359, A well writen application uses standard routines to do rendering and screen display. Changing only those set routines to call openGL code should be very easy to implement. Recompiling the code on a modern system should only take a few minutes to a couple of hours. That said: I agree with you . I bet it'd require a complete rewrite. And if he doesn't start talking more about SR4 instead of P6, he's going to lose more sales. Fix the GD current product to the point where it does what it is advertised to do first.