Here you go. This is what I found Debug Message: Version v1.5 last updated on: Thu Jan 11 13:39:19 2007
Debug Message: GalCiv2 is activated.
Debug Message: Checking DX Version.
Debug Message: *********DXDiag info follows.*********
System Info
Time: 5/10/2007, 21:50:08
DirectX Version: DirectX 10
Machine Name: ENTERPRISE
Operating System: Windows Vista™ Home Premium (6.0, Build 6000) (6000.vista_rtm.061101-2205)
Languages: English (Regional Setting: English)
System Manufacturer: Gateway
System Model: FX530XT
BIOS: Default System BIOS
Processor: Intel(R) Core(TM)2 Quad CPU @ 2.66GHz (4 CPUs), ~3.2GHz
Physical Memory: 3068MB RAM
Page File: 1343MB used, 4990MB available
Windows Dir: C:\Windows


Display Info
Display device 1:
Device Name: \\.\DISPLAY1
Card Name: Radeon X1950 CrossFire Edition
Manufacturer: ATI Technologies Inc.
Chip Type: ATI Radeon Graphics Processor (0x7240)
DAC Type: Internal DAC(400MHz)
Key Device: Enum\PCI\VEN_1002&DEV_7240&SUBSYS_0D021002&REV_00
Display Memory: 512 MB
Current Display Mode: 1920 x 1200 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Max Resolution:
Driver Name: atiumdag.dll,atiumdva.dat,atitmmxx.dll
Driver Version: 7.14.0010.0489
Driver Date: 3/14/2007 21:42:49
DirectX Acceleration Enabled: Yes



Sound info
Sound device 1:
Description: Speakers (Creative SB X-Fi)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: PCI\VEN_1102&DEV_0005&SUBSYS_00211102&REV_00
Manufacturer ID: 1
Product ID: 100
Driver Name: ctaud2k.sys
Provider: Creative
Driver Version: 6.00.0001.1272
Driver Date: 3/5/2007 18:00:48
Type: WDM
Other Drivers:
Acceleration Level: 1
Cap Flags: 0
Min/Max Sample Rate: 0, 0

Sound device 1:
Description: SPDIF Out (Creative SB X-Fi)
Default Sound Playback: No
Default Voice Playback: No
Hardware ID: PCI\VEN_1102&DEV_0005&SUBSYS_00211102&REV_00
Manufacturer ID: 1
Product ID: 100
Driver Name: ctaud2k.sys
Provider: Creative
Driver Version: 6.00.0001.1272
Driver Date: 3/5/2007 18:00:48
Type: WDM
Other Drivers:
Acceleration Level: 1
Cap Flags: 0
Min/Max Sample Rate: 0, 0



Debug Message: *********END dxdiag info.*********
Debug Message: Entering WinMain
Debug Message: ******* Starting Game Shell *******
Debug Message: Going Fullscreen
Debug Message: Preparing to change display settings.
Debug Message: Using multilsample setting: D3DMULTISAMPLE_4_SAMPLES
Debug Message: Could not create the render device using default format. Switching to 16bit
Debug Message: Using multilsample setting: D3DMULTISAMPLE_NONE
Debug Message: Could not create the render device.
Debug Message: InitializeDirect3D Failed.
Debug Message: Now Fullscreen
Debug Message: Shell initialization complete
Debug Message: WM_CLOSE message received.
Debug Message: GameUninitialize start

Go to My Documents\My Games\GalCiv2, open the file prefs.ini, and make the following changes:

Change
DisplayWidth=1024
DisplayHeight=768
ColorDepth=32
Fullscreen=1

To
DisplayWidth=1920
DisplayHeight=1200
ColorDepth=32
Fullscreen=0

Then save the file and start the game.