Help to find any Driver for 8400M GT For Notebook SONY VGN-NR31SR/S

Hello everyone,

Could you please help me to find the video driver for
Nvidia Geforce 8400M GT GPU.
I just replaced Windows Vista to XP and found that XP not contained
any driver for this device.
The Nvidia website also contains the drivers only for another models like 8800 etc.

Is this driver avaliable (for XP), or I’m doomed to use Vista? :no:

Thanks in advance. :/