Just out of curiosity, why do you want to play in fullscreen mode? You can make windowed EQ fill your entire screen which eliminates the need to alt-tab altogether. If I had to alt-tab every time I needed to look something up, EQ would basically be unplayable.
Here are my resolution settings:
WindowedWidth=1680
WindowedHeight=982
Width=1680
Height=1050
FullscreenBitsPerPixel=32
FullscreenRefreshRate=0
WidthWindowed=1680
HeightWindowed=1050
And here's what it looks like when I'm playing in windowed mode:
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