@avatar, lol I had like the same PC. It's really not that good although it seems strange to me that it can't run the game normally.. I got quad core 2.5 ghz and 4 gb ram now, runs better, heh heh :D
@SoldierofLight : go to the achievements page, then scroll down even below the final achievements, keep scrolling down until you see the arrow which says "nothing below here" Then slightly above that hold your mouse in the center of the screen and you should see you cursor change. Then type the code in which I can't remember.