i just downloaded it from steam and i am running it through 32-bit Windows XP and i just can't seem to get a good framerate out of it. i am using the new 2.4 ghz aluminum macbook with the 9400m and i can run source games on high (CSS, L4D, TF2, etc...) and i just can't seem to find the right settings for Mass effect. whenever i am inside a building the game runs perfectly at about 30-40 fps, but when i walk outside into the Citadel or on a planet it starts really acting up. Does anyone have a driver they could recommend or some settings that the use? thanks in advance