Many games do not work with PCSX2, and even if they did, they would run approx. 5-15fps depending on your system. I wouldn't call that playable. Besides, I've heard no info that God of War works in PCSX2 to begin with. Regarding the error, there's not much you can do, as part of the program executed an illegal operation. One would probably need a 7Ghz computer with the latest 512MB dual core graphics card, to get a steady 60/60 framerate, and still that's just a guestimate.