Otherwise if you’re rolling with Windows 7 with WDDM drivers you’ll be able to upgrade to version 2.xx, I’ve read that it’s possible to get TF2 working on it, no confirmation on my end since I haven’t tried it.

however, it works beautifully on l4d2, any ideas on to what is wrong?

Im sorry that I have to ask this here but Im unable to comment on your new config file for softth (although I susbscribed…).
I wanted to know if you can play left 4 dead on dual monitors using softth. I used the following commands to disable one of the 3 monitors (I dont own a third monitor):
deviceIDLeft=-1
deviceIDright=1
What I want to do is to span the game on my 2 monitors so that I can play Left 4 dead splitscreen with a friend with both of us having one monitor (If you are interested in how to do it read this: http://www.jaytheham.com/l4d/l4d_ss_guide.htm).
However my desired resolution will never show up ingame and if I change it so something else (like 5040 etc.) the game goes completely black and even alt+tab doesnt help.
Can you help me or do you have some advice for me?

Best regards

PS: here is my config file:

; SoftTH 1.08 configuration file
; by Kegetys, http://www.kegetys.net
;

[config]
; deviceIDLeft/right: Direct3D device ID’s of left and right monitor, or ‘auto’ for automatic
; secondaryWidth/Height: Left&right monitor resolution, or ‘auto’ to use same as middle screen resolution
; secondaryRefresh: Refresh rate of left & right monitors, or ‘auto’ for automatic
; secondaryFormat: Secondary device image format, ‘RGB32′, ‘RGB16′ or ‘RGB16D’.
; borderSize: Size in pixels of frame border between monitors that is discarded
; noHotkeys: Set to 1 to disable all hotkeys
; noOSD: Set to 1 to disable on-screen display when changing settings
deviceIDLeft=-1
deviceIDright=1
secondaryWidth=1920
secondaryHeight=1080
secondaryRefresh=60
secondaryFormat=RGB32
borderSize=0
sideExtraWidth=0
noHotkeys=0
noOSD=0

[Direct3D]
; ** Advanced setting for Direct3D games **
; lensCorrection: Lens correction, set to 1 to enable support. >1 to enable by default
; lensCorrectionEdge: Lens correction edge offset
; hideNondefaultDevices: Hides all but the default adapter from the game
; forceHorizontalFOV: Forces horizontal FOV to be three times as wide
; forceResolutionWidth/Height: Forces device to be created with this resolution
; force16bitDepth: Force game to use 16bit depth buffer, can improve performance and reduce memory use
; sleepBeforeRead: Time in ms to sleep before reading back buffer data from video card
; useMultihead: Uses multihead features of primary card if available, can increase performance and reduce memory use
; delayedPresent: When useMultihead enabled, delay primary monitor present to sync with secondary head
; swapOrder: Swap order at which the frame contents are copied
; d3d8dll: Path to D3D8.dll/D3D9.dll to use or auto for automatic (system32 dir)
lensCorrection=1
lensCorrectionEdge=0
cylindicalCorretionAngle=0
hideNondefaultDevices=1
forceHorizontalFOV=0
forceResolutionWidth=0 <——- my desired resolution is 3840×1920 but the game crashes with that value ;so I leave it to zero
forceResolutionHeight=0
force16bitDepth=0
sleepBeforeRead=2
useMultihead=0
delayedPresent=0
swapOrder=0
autoSquash=0
d3d8dll=auto

[hooks]
; Win32 API hooking settings – Used for some extra compatibility and game-specific fixes
; doHooking: Enable/disable hooks in Direct3D, with OpenGL hooks are always enabled
; doScaleMouseCoordinates: Scale mouse coordinates for getCursorPos to fix games which do not handle negative screen coordinates properly
; doScaleFromLeftScreen: Spread out mouse coordinates from left screen to full width
; doScaleWindowRects: Scale focus window WindowRect
; mouseXoffset: Number of pixels to offset mouse cursor position in X axis, to fix misplaced cursor due to negative screen coordinates. auto = use X resolution
doHooking=1
doScaleMouseCoordinates=0
doScaleFromLeftScreen=0
doScaleWindowRects=0
mouseXoffset=auto

; Triplehead screenmodes to add to resolutions list (width multiplied by 3 and border added)
; 'auto' adds current primary monitor desktop resolution
; Must be last in this file
[modes]
1680x1050x60
1680x1050x60
1680x1050x60
1920x1080x59
1920x1080x60
auto