[SAS~CirX]

Here is what you should look like (only with your resolutions of course)

[window]
width=1680
height=1050
ColourBits=32
DepthBits=24
StencilBits=8
ChangeScreenRes=1
FullScreen=1
DrawIfNotFocused=0
EnableResize=0
EnableClose=0
SaveAspect=0
Use3Renders=0

MAKE SURE that the resolutions you put in are the same are the resolution your screen is set to in your dispay properties tab in windows.

Now, THIS is very imprtant: Is your screen in full screen mode (without the black bars at the side) WHEN YOU ARE ACTUALLY FLYING?
Bacause, your GUI will still always be in 4:3. The resolution you set up in your config.ini only kicks in when you fly.