assuming your running windows.......it would be a good idea to uninstall your current driver (windows will revert to its stock driver) download the newest driver directly from nvidia or amd (depending on what card you buy) unzip if compressed and run the setup file.....select express install and just keep clickin next or ok and it'll almost do it itself
if I were you, I'd definately remove the old display driver. be careful not to uninstall your chipset driver tho. after you uninstall, you should use driver cleaner pro to remove everything else associated with the HD3200. turn your computer off, install your new video card, then install new video card drivers.