Roy Barris

I find the walkthrough tool uncontrollably fast. There is no gradual control of the speed as in VW 11, even with OpenGL rendering. First there is no response, then as I move the mouse, it accelerates like a rat on cocaine into the distance. Even a click with no mouse movement can do it. Mouse speed setting has no effect. Please help. PC WinXP NVidia Geforce 7600 GS Ig ram Intel duocore something or other Roy