I installed Ubuntu 12.04 and install MyUnity tool. I was able to customize the interface but after I installed the NVIDIA Driver a lot of changes to the interface happens. Some changes are good when it comes to the quality of icons but other things went too ugly (example: the workspace switcher popup "ctrl+alt+up/down").
Now I want to either be able to customize the interface with MyUnity or similar tools because it's giving me this message "Your Ubuntu 12.04 is running in 2D mode. Many features will not be available" or I want to get back my default graphic card "nouveau".