Hello. I have requested your mail and looked into it.
Sorry to admit, I cannot help you much. The problem itself most probably comes from your integrated videochip nVidia 6150SE, which in fact is not designed for gaming. The Vista itself is not the issue, and the rest of your hardware is quite good.
I will probably will be able to get some more information from log files ( they are at C:\ProgramData\Enkord\Totem Tribe ( not Program Files! ) ), though I'm afraid that will not help much.
Have you tried to run any other games on this system?