GTAIV command line arguments

One can use the commandline.txt with ths single line -help to get a pop up with the list of available options for launching GTAIV. I used SnagIt to capture the pop ups output.

This output is from GTAIV steam version 1.0.7.0 (the latest version as of writing).

LaunchGTAIV.exe [options]
Where [options] are one or more of:

==== [ Global ] ====
-adapter: Use the specified screen adapter number ?zero-based?
-disableimposters: Turn of the imposter rendering for vehicles
-noBlockOnLostFocus: Don't block the window update when it loses focus.

==== [AUDIO] ====
-fullspecaudio: Force high-end CPU audio footprint
-minspecaudio: Force low-end CPU audio footprint

==== [GLOBAL] ====
-benchmark: Determines if we run the benchmark immediately
-safemode: Sets graphics setting to lowest setting

==== [GRAPHICS] ====
-forcehighqualitymirrors: Enable 64 bit mirrors
-forcer2vb: force r2vb
-frameLimit: number of frames to limit game to
-framelockinwindow: Force framelock to work even in a window ?works best with
 60Hz monitor refresh?
-fullscreen: Force fullscreen mode
-gpucount: Lets you manually set the GPU count if query fails
-height:  Set height of main render window ?default is 480?
-managed: Use D3D runtime managed resources
-nominimize: Disables the ability to restore the game from minimize and
 changing resolutions - Reduces System Memory Footprint
-norestrictions: Do not limit graphics settings
-noswapdelay: Disable sleep delay before Present ?disable fix for hard Present
 stalls?
-novblank: Disable wait for vblank
-refreshrate: Set refresh rate of main render window
-stereo:  Set game to support stereo rendering mode
-unmanaged: Use application managed resources
-width:   Set width of main render window ?default is 640?
-windowed: Force windowed mode

==== [INPUT] ====
-usedirectinput: Allow DirectInput alongside XInput support.

==== [MEMORY] ====
-availablevidmem: Percentage of available video memory
-memrestrict: Set the restriction the amount of available memory for managed
 resources
-no_3GB:  Disable 32bit OS with /3GB
-nomemrestrict: Do not restrict the amount of available memory for managed
 resources
-noprecache: Do not precache resources
-percentvidmem: Percentage of video memory to make available to GTA
-reserve: Amount of memory to set aside for other applications
-reservedApp: Amount of memory to leave available within application space

==== [QUALITY SETTINGS] ====
-autoconfig: Automatically adjust quality setting to maintain desired frame
 rate ?15-120?
-detailquality: Set detail distance ?0-99?
-renderquality: Set anisotropic filtering ?0-4?
-shadowdensity: Set the number of lights that cast shadows
-shadowquality: Set the shadow quality ?0-4?
-texturequality: Set texture quality ?0-2?
-viewdistance: Set LOD view distance ?0-99?

==== [TIME] ====
-notimefix: Disable Time Fix

Props to:
mkey82 @ GTA Forums for publishing some great related info