No mention made in the Unix Companion Guide about software renewal, much less a silent interface approach - this item would be in the SAS foundation DOC, most likely.
SAS Support has a Windows-specific tech note on their website just for this topic, which is why I recommended contacting them for assistance and guidance with this requirement. Sometimes that's what it takes (with enough interest) to get some attention with this type of productivity gain solution. And I'd submit that it's not enough just to post on this forum if you really are expecting SAS support to hear and react - you need to contact them directly to pitch your case/story.
Scott Barry
SBBWorks, Inc.
Problem Note 31021: The Renew SAS® Software utility runs in Quiet Mode in SAS 9.1 and SAS 9.2 (applicable systems - Windows only)
http://support.sas.com/kb/31/021.html
SAS 9.1.3 Operating System-Specific Documentation (Solaris):
http://support.sas.com/documentation/installcenter/913/hosts/index.html#I