usually windows xp autodetect the correct driver by itself... as my notebook also use matsushita (panasonic) and when i reinstall the windows xp (my own and not from recovery cd), it detect it automatically.... this also applies to windows millenium edition and windows 2000 w/ any service pack....
perhaps you should reinstall the driver from the windows itself.....
if this dont work, try to search at
www.google.com