Originally Posted by redshtef
I have ATI Radeon HD 4670 card
There have been a few issues with running Republic Commando with this particular card - a lot of people have reported crashes while trying to play the game.
My best advice is to try setting all of the graphics options to low (especially the bump-mapping - that's the most common problem with getting RC to run), and see if that works. If it does, then you can see about tweaking the graphics settings to see what is causing the problem.
I'm having a closer look to see if there could be any other problems, but that's my best advice for the moment.