YanC (Yet another nV Configurator) is a small tool which you can use
to change the nVidia and ATI-specific settings (almost) as easily as
with the Windows drivers. You can edit the settings for AGP support,
the Cursor Shadow, the nVidia logo, Digital Vibrance Control, and,
of course, TwinView for the nVidia drivers. For the ATI drivers, it
offers support for the overlay settings, anti-aliasing, and dual monitor
configuration.
