Another example for the crashes. By the looks of it (i'm no genius) but i'd say your computer should have no worries runnning SCS. However running the Vista64bit seems to me what's going wrong. I've read somewhere that this game wasn't tested fully on Vista64bit (Or something like that...)
Still, atleast you're not blowing your head off. Try running the game windowed, turn the graphics and/or resolution up/down and so on. Check for updates and let the Support Team know what's happening.
As you can see, i've not had the very best of luck either but if you can get it running smoothly for more than an hour or two then you're doing great!