Try this:
1. Go to the
standard vga adapter and change the
drivers to the built-in
intel 945 driver using the "Pick from list" option (Remember to uncheck "Show compatible hardware" to see the list). OK through all error or compatibility prompts and reboot.
2. Once rebooted you will see a yellow triangle on the new device. Proceed to update the
driver using "Have disk" and install the signed
855gm XP drivers. Do not reboot...
If your set up is similar to mine, you'll notice that you don't have to reboot after changing the
drivers. You'll also notice that when you go to display properties, the intel
drivers are somehow working and you can set your lcd to native resolution.
Now to the bad news... after reboot, the standard vga adapter
driver takes over again and all is lost

This is where i am.. Hopefully somebody can figure out how to take this to the next step. There is no doubt the XP drivers work.. it's just Windows 7 has problems with it during boot-up.