Video Driver For Dell Latitude D610?

I've tried many different beta builds of Windows 7 on my Dell Latitude D610 including and up to build 7229, but they all have the same problem. Everything works great except for the video driver that is downloaded through Windows Update. The video card driver that is downloaded through Windows Udate is the "Mobile Intel(R) 915GM/GMS,910GML Express Chipset Family". Once the driver is installed, and the laptop restarted, everything looks great at the native 1400x1050 resolution until I click on the Start button or fire up IE8. Then the entire screen washes out I can't read anything. It's hard to explain, but basically it looks like the contrast and brightness is turned all the way up and makes the laptop unusuable. I tried downloading the drivers from Dell's website, but they are for WinXP only and I didn't have any luck installing them. I also tried going to Intel's website and looking for a Win7 beta driver for my video chipset but didn't find any.