Nokia 5510 USB Support in Windows XP Home Edition

According to the FAQ on the 5510 Product support page, there should be a Universal Serial Bus Controllers named
"USB Mass Storage Device" for which one should update the driver.
Unfortunately my PC doesn't have a driver named like this, although I have lots of USB ports (3 frontside, 2 backside). My drivers are named (Translated from Danish by myself):
'SiS 7001 PCI to USB Open Host Controller' (3 of these)
'SiS 7002 USB 2.0 Enhanced Host Controller' (1 of these)
'USB 2.0 Root Hub' (1 of these)
'USB-storageunit' (1 of these)
'USB-roothub' (3 of these)
So the question is, which one is my "USB Mass Storage Device" ?

Regards