I can't remember for certain (old age and all that!
), but isn't there an option in the driver package to uninstall or remove? Seems to me you can uninstall the driver within the driver package before installing, if that makes any sense. If not, you should be able to uninstall them through the device manager. Right click and choose uninstall, under the processor tree. Alternatively, you could double click, then choose the driver tab and then the uninstall option.