nVidia just released the version 43.45 graphic driver
Windows 9x: http://www.nvidia.com/view.asp?IO=win9x_43.45
Windows XP: http://www.nvidia.com/view.asp?IO=winxp-2k_43.45
According to nVidia, their new driver supports DirectX 9
P.S. Microsoft just released DirectX 9.0a on March 25th, 2003, check the following link for details
Note: It is strongly recommended that you uninstall any previous version of nVidia driver before you update it to the new driver.