9800 pro will not install

I have downloaded a 9800 pro driver from Dell. Comments on a forum suggest these are better than the ATI 3.9 for the Dell 8300.I have uninstalled all drivers from my PC but when I try and install the Dell 9800 Pro driver, it first errors with 'inf file not found'. Then a message tells me no video driver was found so I should install a standard VGA driver and then try again.So I try and install a standard VGA driver but all I get from windows are old ATI drivers - where did the standard ones go? I have XP now but I remember in W98 I could select 'all drivers' and pick the VGA - why do I only see old ATI drivers in XP?So I am stuck with no driver - I even tried the ATI 3.9 install but I get the same error!Help!Ray Keattch