Would you share the .inf?
here it is. keep in mind, this is specific to these dell monitors only. basically what i did was open up phoenix then load up the dell 3008wfp EDID from registry. i then edited it and removed all the display modes except 2560x1600 keeping the sync polarity as is for that mode. saved the modified EDID as a .dat file which i opened in MonInfo and finally saved it as an inf. finally, i went into device manager, uninstalled all 3 monitors (checked the option to delete their drivers) and reinstalled all 3 monitors using the below inf. once i rebooted and went into nvidia control panel i was able to enable surround. i *think* this worked for me because the 3007 and 3011 were able to be run at the same sync polarity as the 3008 in 2560x1600, even though they don't normally use the same polarity at that mode.
Code:
; INF file generated by Monitor Asset Manager (2.59.0.934), 4/16/2011
; Copyright (c) EnTech Taiwan, 1995-2011.
; Internet: http://www.entechtaiwan.com
[Version]
Signature="$WINDOWS NT$"
Class=Monitor
ClassGUID={4d36e96e-e325-11ce-bfc1-08002be10318}
Provider=%MFG%
DriverVer=4/16/2011, 1.0.0.0
;CatalogFile=YourSignedCatalogFile.cat
[DestinationDirs]
DefaultDestDir=23
[SourceDisksNames]
1=%DISC%
[SourceDisksFiles]
;YourColorProfileFile.icm
[Manufacturer]
%VENDOR%=EDID_OVERRIDE,NTx86,NTamd64
[EDID_OVERRIDE.NTx86]
%PRODUCTID%=OVERRIDDEN-EDID.Install, MONITORDEL4035
[EDID_OVERRIDE.NTamd64]
%PRODUCTID%=OVERRIDDEN-EDID.Install.NTamd64, MONITORDEL4035
[OVERRIDDEN-EDID.Install.NTx86]
DelReg=DEL_CURRENT_REG
AddReg=OVERRIDDEN-EDID.AddReg, MODE1, DPMS
CopyFiles=OVERRIDDEN-EDID.CopyFiles
[OVERRIDDEN-EDID.Install.NTamd64]
DelReg=DEL_CURRENT_REG
AddReg=OVERRIDDEN-EDID.AddReg, MODE1, DPMS
CopyFiles=OVERRIDDEN-EDID.CopyFiles
[OVERRIDDEN-EDID.Install.NTx86.HW]
AddReg=OVERRIDDEN-EDID_AddReg
[OVERRIDDEN-EDID.Install.NTamd64.HW]
AddReg=OVERRIDDEN-EDID_AddReg
[OVERRIDDEN-EDID_AddReg]
;Base EDID
HKR,EDID_OVERRIDE,"0",0x01,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x10,0xAC,0x35,0x40,0x4C,0x36,0x32,0x35,0x1C,0x13,0x01,0x03,0x80,0x41,0x29,0x78,0xEA,0x8F,0x95,0xAD,0x4F,0x32,0xB2,0x25,0x0F,0x50,0x54,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0xB0,0x68,0x00,0xA0,0xA0,0x40,0x2E,0x60,0x30,0x20,0x36,0x00,0x81,0x90,0x21,0x00,0x00,0x1E,0x00,0x00,0x00,0x10,0x00,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x00,0x00,0x00,0x10,0x00,0xB0,0x23,0x40,0x30,0x20,0x36,0x00,0x81,0x91,0x21,0x00,0x00,0x1C,0x00,0x00,0x00,0x10,0x00,0x31,0x56,0x1D,0x71,0x1C,0x00,0x0A,0x20,0x20,0x20,0x20,0x20,0x20,0x00,0xF0
[DEL_CURRENT_REG]
HKR,MODES
HKR,EDID_OVERRIDE
HKR,,MaxResolution
HKR,,DPMS
HKR,,ICMProfile
[DPMS]
HKR,,DPMS,,1
[MODE1]
HKR,,MaxResolution,,"2560,1600"
[OVERRIDDEN-EDID.AddReg]
HKR,"MODES2560,1600",Mode1,,""
[OVERRIDDEN-EDID.CopyFiles]
;YourColorProfileFile.icm
[Strings]
MFG="EnTech Taiwan"
DISC="Monitor EDID Override Installation Disk"
PRODUCTID="Dell DEL4035 (DEL4035 EDID Override)"
VENDOR="Dell"