I tried these and managed to eek out another ~5 fps. I'm now running ~25ish fps on my Phenom II x4 955 @ 3.2 ghz, 4 gb DDR2, and a HD 5700. Still looking for some advice if I should splurge on a GPU and ram or will I see more improvement picking up a new rig with a more current CPU and type of ram. Any help would be greatly appreciated.