I'm close. Using a P4 2,2 GHz on Win XP. Poser 5 runs pretty smooth and handles the new dynamic hair at an acceptable speed. I still think it's too slow when moving from one room to another, but that appears to be something everyone is experiencing. Rendering dynamic hair with the FireFly renderer is slow, simply because it's an exptremely time consuming task compared to the "old" Poser 4 scenes. When comparing with other 3D applications in similar situations, FireFly is not extreme in any way though. The SR1 patch did speed uo renders somewhat. I think that any NT based system (2000 or XP) is preferrable when running Poser 5, since the memory handling is crucial. The NT kernel is superior compared to 95/98/ME in that department. You didn't state your RAM specification, that will affect your Poser 5 performance greatly as well (my machine runs with 512 Mb).