ouch i do agree with what you said on Alienware and the same with the codeing. but 1.8ghz should be fine too run the game depending on the settings he uses. its not like hes gona hit the max button and hope too get a pure 120 fps. right off the bat hes looking at 800x600 with med too low of not all low settings and again as you said its about the codeing.
Completely agree - But 1.8Ghz is JUST and nomore stretching the estimated of whats needed.
Playing on the suggested format of "Lowest" settings - Can bring terrible gameplay, Regardless whether his fps is 20-30.
Dont get me wrong, Each to there own - But i just couldnt justify playing this game on lowest settings, and enjoying it for its full capacity,
My advice would be to upgrade the processor - Or if you think you "Can".....(DO AT YOUR OWN RISK) - You could possibly try OverClock the CPU and push it too 2.0 / 2.2Ghz.
But my best bet would be to buy a new CPU - Everything else spec wise is fine, and you can pick up a nice Dual core 2.7+ Ghz very very cheap.