Pre-patch your XP Setup CD once; never have to install SP2 again. Fred Langa walks you through a 16-step process. Our recent discussions about Windows XP's SP2 show that the huge patch is working fine for most users; and that with caution (make a full backup or image beforehand; read and follow all of Microsoft's pre-SP2 installation tips), even potentially troublesome installations can be handled smoothly. But not swiftly: The update process can take a considerable chunk of your workday, even if you don't count the download time or install from the free SP2 CD. Twenty to 40 minutes seems...