How many EG users do you support? I would recommend that SCCM-type solutions, as @Nigel_Pain suggests, are only worthwhile for large user numbers. Please note that for each upgrade you would need to request a new SAS Software Depot, download it, then do the SCCM packaging.
In my experience, for small user numbers (say < 50) the "Check for Updates" facility is far preferable as it requres less work. If company policy prevents users doing this themselves, then can your help desk do the upgrade for these users applying their admin rights? Also it is perfectly OK to have users with varying versions as long as they are at least all on EG 8. It really isn't necessary for all users to be upgraded each time there is a minor upgrade.
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