http://fileforum.betanews.com/detail/ATI_Catalyst_Drivers_for_Windows_XP/1058330408/1
and being an nvidia person, i like the modded sets from tweaksrus:
http://tweaksrus.com/index.php?option=com_docman&task=cat_view&Itemid=1&gid=127&orderby=dmdate_published&ascdesc=DESC