http://uk.europe.creative.com/suppor...ct=1&x=26&y=13
The driver is at the top of the list. It may or may not be the same one that's already installed (and one is installed because it's listed in your post)
Anyway, it has to be worth a try. It's dated October 2006 so it's not exactly bang up to date but it's the latest 'official' one for XP.