3D Spotlight has posted a Deep Space 9 - The Fallen tweak guide.
GameDetail. This setting controls optional effects in the game such as weather. Select True to enable these effects, although these can reduce performance. Select False to disable these effects for best performance.Read more
MinDesiredFrameRate. Set this to equal to whatever you feel is the minimum for a playable game. 30 should be the ideal minimum frame rate for most users. This specifies the frame rate threshold below which DS9 - The Fallen will start dropping detail - reducing model detail & not drawing optional effects. If this is set higher than your normal frame rate, then you will never see reduced graphics almost always, but get the best possible performance. The ideal setting for this is about 10 frames below your average frame rate.