Guru3D have a new tool, version 1.4 of the GeForceAASet utiltity. This piece of software installs itself in the Windows Taskbar as a couple Tray icons, and gives you fast access GeForce1/2/3 antialiasing settings. Requirements

Windows 9x/Me/NT4/2000/XP.
NVidia reference drivers 5.xx and up (manufacturer-specific drivers haven't been tested, so I'm not sure if they work or not).
A video card that uses one of this NVidia chipsets: GeForce 256, GeForce2, or GeForce3.

Download GeForceAASet v1.4