For some games, I need the nvidia-current driver, but when it's enabled, I can't get my work done as it messes up everything. So is there a way I can get two options in my GRUB menu? One wich will load my operating system with the nvidia-current drivers, and one which will use the default non-proprietary one? It seems a bit stupid to me to have 2 Ubuntu installations (one for games, one for the rest). But I can't get my daily work done with the Nvidia drivers enabled as it messes up some applications, randomly freezes the system, etc. But I still want to be able to play some games.

If there's a way to just load and unload the nvidia-current driver with a script or something, that would also be welcome.