Yes, after installing the Optimizer I rebooted... But as I said, the game never crashed to me, it only kept freezing after 5 minutes of play (the luckiest way) or even at the main menu just as the game was started.
Other thing the Optimizer gave me was a better graphic. During those 5 mins of play, the graphic seemed, how to say... well just as if a picture is digitally zoomed in, some kind of raw and not-so-well-defined graphic. Now it is perfect, medium settings accordingly.
As long as I'm -crossfingers- speaking now, the game runs smoothly...
Btw these are my spec:
XP-SP3 32
Amd Dual 4800+
MoBo Asus M2N
2GB DDR2 800 Kingston
ATI HD4850
