Does anyone know of a way to back up the device drivers from a Windows installation, and then restore them to a fresh install of Windows?

I know that I need to take the INF folder, but what else? The reason I want to do this is I reinstall windows a lot for people who have got a screwed up/bloated with stuff installation of Windows and it's a pain going to each manufacturer's support site to get the drivers. Or maybe there's a utility to do this?

Thanks in advance.