Have you tried reinstalling the drivers?

No dice. Tried all the compatibility options to.

Yeah. It didn't seem to do anything.

I had a similar problem with another game, but it wasn't Vista that was the culprit. Messing around with compatibility modes corrupted an .ini file of the game so it wouldn't launch anymore.
If all previous methods didn't help, try reïnstalling the game, you can make backups of your savegames if you want, they will still work if you copy them back.

You tried reinstalling it, like Strijkbout suggested?

I've re installed a couple time now. I tried again to make sure but with no result. So i re downloaded it and re installed but the problem stays the same.
------------------
System Information
------------------
Time of this report: 5/29/2012, 07:29:37
Machine name: KYLE-PC
Operating System: Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.120402-0336)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: XPS M1530
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A12
Processor: Intel(R) Core(TM)2 Duo CPU T8100 @ 2.10GHz (2 CPUs), ~2.1GHz
Memory: 3582MB RAM
Page File: 1833MB used, 5517MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
DxDiag Version: 7.00.6002.18107 32bit Unicode

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: NVIDIA GeForce 8600M GT
Manufacturer: NVIDIA
Chip type: GeForce 8600M GT
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0407&SUBSYS_022E1028&REV_A1
Display Memory: 1776 MB
Dedicated Memory: 241 MB
Shared Memory: 1535 MB
Current Mode: 1440 x 900 (32 bit) (60Hz)
Monitor: Generic PnP Monitor
Driver Name: nvd3dum.dll,nvwgf2um.dll,nvwgf2um.dll
Driver Version: 8.17.0013.0142 (English)
DDI Version: 10
BGRA Supported: Yes
Driver Attributes: Final Retail
Driver Date/Size: 5/15/2012 04:26:00, 15322432 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-4747-11CF-1673-23221FC2C535}
Vendor ID: 0x10DE
Device ID: 0x0407
SubSys ID: 0x022E1028
Revision ID: 0x00A1
Revision ID: 0x00A1
Video Accel:
Deinterlace Caps: n/a

:( the only thing i can think of right now is that you should change your OS... Have you received an answer from Support?

Looking at your DxDiag shows nothing out of the ordinary. The game should be working fine, according to the requirements on the gamecard....Have you used any of the settings on the nVidia control panel? I dunno if any of that would help. Compatibility settings?

Is there a resolution problem anyone knows about? Like Homeworld, you can set custom resolutions through the Registry?

I am honestly stumped at this point.

Have you tried turning off the antivirus and firewall?
Unplug the router before you turn off the firewall.

No offense, but why would they turn off the router if they are turning off the firewall? Why not just disable the network connection on the computer itself?

Whatever is easier, but not knowing about the level of computer understanding of the user I just went for the safest solution to keep things clear (not having to disable/enable wireless connections and all).

Still can't help much I'm afraid,

If you're getting desperate, you could try going to the nVidia Control Panel, then setting up the "Manage 3D Settings" bit. You can isolate this to a specific application (in your case Sacrifice.exe), then just go nuts! I'd suggest switching it all off, and playing around with the AA settings, but really this is out of my depth. If it all goes wrong, you can just remove the Sacrifice profile from there, and it will revert to as it was.

Worth a shot...

EDIT: Also in there is an option on the left menu to "View compatibility with games". Sacrifice is in the list for me, but it just says I'm ok. It might have suggestions for your card.

Shouldn't something be listed there ? On my own DxDiag i have a bunch of stuff listed there. My card is also a Geforce, diferent model though.

In Dxdiag's visualization tab what does it say for

DirectDraw Acceleration
Direct3D Acceleration

Does it say "Enabled" ?

Actually it shows that DirectDraw Acceleration is disabled and Direct3D Acceleration is partially enabled.

then enable it.