How to remotely deploy software updates?

Hi all, We have a xserve running 10.4 server and the software update service. We also have a copy of Apple Remote desktop v3. All our macs log in via active directory with group managemnet from the open directory on the xserve. Software update service works, in that it mirrors the apple updates, but it doesnt do enough in a managed enviroment. None of our users have admin access on the clients, so can not install the updates. So somebody still has to walk round, log in with an admin account, and then install the updates, which isnt much better than not having the software update service. Is there a way to remotly deploy the updates without having a users with an admin account using the client? Thanks