I thought everyone might be interested in this from Adobes site:
My users cannot go to the Adobe website to install Flash Player. How can I deploy Flash Player and related updates over my network?
Adobe Flash Player installers can be licensed for distribution over intranets and through fixed media at www.adobe.com/licensing/. Flash Player installers require administrator privileges on the machine.
Registry Permissions required for Flash Player Install or Update
http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_19148&sliceId=1