if you don't want to get sp4 then do this:
you need to get the win2k usb2 driver from the windows update site.
in the left pane,highlight personalise windows update then check the box for display the link to the windows update catlog>click save settings
in the left pane highlight windows update catlog>find hardware drive updates.
manufacturer is microsoft. under words type usb >search
you only want the usb driver version 5.1.2600.0 108kb