Downloading SLES9 updates?

Hello, we administer a number of SuSE Professional and SLES machines. To reduce installation time we download updates for SuSE Professional nightly, so we have all updates available locally. With increasing numbers of SLES machines, we'd like to do the same - right now our installation takes approx. 35 minuts while updating takes 4-5 hours. Is it possible to download updates for SLES on a non-SLES machine (using usernames and passwords)? If so, how? Thanks, Danilo