You can download it from the Asus official website, click this
LINK, this will direct you to your graphics card drivers download page. On the page, click the down arrow button on the right side of "
O.S" (beside the red texts "*
Required") and select "
WinXP", the available download options will be displayed to you, click "
VGA" to expand it and download the driver. You'll need to click the floppy disk icon labelled as "Global (DLM) etc.." to begin the download. The topmost among the available lists of downloads is the latest version (updated). I would recommend you to download it. Alternatively, you can download it from this
LINK(direct download link). The driver package will come down as a zip file. I hope you know how to open zip files on your computer. Windows xp can open .zip file (by default). Let me know if you need further help.
Good Luck.
Thanks for using
FixYa.