I have just got S:CS Limited Edition and have installed to Vista 32x and it is at version 1.5 or 1.4 not sure. Anyway I have installed and started a new game, it plays the beggining movie and when you wake up and the Clear Sky guy walks towards you it CTD's with no error or anything .... anyone else got this prob or knows how to fix that would be great.
Next time it crashes, open up notepad and press Ctrl + V. It'll paste whatever was logged by the game.
Post the log here and it should tell you what's going wrong.
Make sure your drivers are up to date. And if your PC is low-medium spec, turn some graphic options down a little.