Use Noveau NVIDIA driver instead of proprietary driver

view story

http://askubuntu.com – I would like to try the Noveau driver instead of the proprietary NVIDIA driver. No problem with the proprietary one, but I would like to see a proper Linux Kubuntu splash screen, which requires kernel graphics support. Please provide me with a solution so I can "go back" to proprietary if the open ones can't support Google Earth for example. (HowTos)