Vista driver for asus n6600le

Hi can anyone advise me if there is a driver available for asus AGP 256 n6600le graphics card. Ive been using some of the nvidia drivers but I am having problems with Fifa 08, its slow to the extent of being unplayable. Ive upgraded my Ram from 1 - 2GB, Vista home premium itself seems nippy enough, but I dont seem to be able to locate the correct graphics driver. Im wondering if microsoft has some generic driver available, because ASUS themselves do not have a vista driver for this card ??

Any suggestions very much appreciated.