MS Software Update Option not present in

I’ve installed MS Software Update Service (MS SUS) on my win2K network. I’ve configured the SUS server. It’s retriving updates from MS update site. But problem is how to configure clients using GPO. When I open GPO & then check Computer Configuration > Administrative Templates then there is no Windows Updates folder. as MS SUS suggests to configure clients using option under Windows Updates at that location.

Any idea why its not showing that folder. I’ve w2k SP3 installed on all PCs. I know there are registry keys to configure clients. But it would be easier to configure using GPO.