You should install patch 1.44. Always install the latest patch.
Anyway, what is the exact point in the game that the game crashes? (During the main menu, during the loading, during a movie, during the game...) Or is it random? Or is it time based? Do you have problems with other games?
Also, don't forget to download the latest drivers for you videocard...
And finally, post your computer specifications, the more info you give, the easier we can help you...