...
Never use an INI file of another person. That's almost always asking for problems.
That's actually pretty good advice. While there are many neutral settings that can improve image quality, there are also several that have been known to actually cause problems with game stability.
Here are the setting that I use, and I have had only a few random crashes since release:
;;; These are the current customizations for C:\Users\Games\Documents\My Games\Skyrim\SkyrimPrefs.ini
[CONTROLS]
bMouseAcceleration=0
[DECALS]
uMaxDecals=2500
[DISPLAY]
bDrawLandShadows=1
bDynamicWindowReflections=1
bFloatPointRenderTarget=1
bTreesReceiveShadows=1
bUseSunbeams=1
iBlurDeferredShadowMask=10
iMultiSample=16
iShadowFilter=4
iShadowMapResolutionPrimary=4096
iShadowMapResolutionSecondary=4096
iShadowMaskQuarter=10
iWaterMultiSamples=4
[GAMEPLAY]
bShowFloatingQuestMarkers=0
[GRASS]
fGrassMaxStartFadeDistance=12000.0000
fGrassStartFadeDistance=25000.0000
[INTERFACE]
fMouseCursorSpeed=1.0000
[LOD]
fLODFadeOutMultActors=20.0000
fLODFadeOutMultItems=20.0000
fLODFadeOutMultObjects=20.0000
[MAIN]
bCrosshairEnabled=0
fHUDOpacity=0.4500
fSkyCellRefFadeDistance=300000.0000
[TERRAINMANAGER]
fTreeLoadDistance=300000.0000
[TREES]
uiMaxSkinnedTreesToRender=40
[WATER]
iWaterReflectHeight=2048
iWaterReflectWidth=2048
;;; Generated by Ini File Editor v1.4.
And if anyone's interested - I have an INI editor over at SkyrimNexus: http://www.skyrimnexus.com/downloads/file.php?id=514