I loaded it on my PC at work as well... the same thing happened. Luckily, I had the update file. Once I loaded that, the shadows went away and I got the 'real' graphics. Not sure if you can download the update file any more. I went to RF and asked, and the guy sent the file to me.

You said that you were running Vista... I've got mine running on XP. I don't know what ramifications (if any) there will be running it on Vista.

Send me a PM... I found a file that might be useful. But, no promises.

Bob