Well, I just went into the folder C: > DELL > Drivers and I did not find R106456. What I mean is there is no folder that is called R106456 in C: > DELL > Drivers
Install via the Device Manager. See Windows Reinstallation Guide page 431-433:
Right click the device and select update driver. Select location as C:Dell\Drivers\R106456
No method of the R160456 install worked for me. I went to the "driver guide" site and found a "custom" version of the Intel-direct driver (driver download 1454943) and it works flawlessly now. Just remember to DECLINE and NOT "next" any/all offers during the install process. Resolutions up to the 1280 range are now available. Much better than the 800x600 that Windows7-internal driver peaks at with more than 256 colors. And the best part- it was FREE! I was half tempted to upgrade the video to a discreet card, but I found that driver instead. I thought at the time that windows 7 was an UPgrade, it seemed to have taken me way back (visually at least) to the 386DX CPU/256Meg video card days. Didn't like that recent-retro visual at all. All better now.