OK, but until you get your VCS implemented and, more importantly, enforced, there's nothing you can do safeguard against "people squirrel away a document, edit it as a personal copy and email it around". How your versioning will be controlled by a VCS really depends on how that system works.
Since you're using Office, you might consider using SharePoint (see
http://office.microsoft.com/en-us/wi...010021576.aspx). It may not be the best VCS out there, but it's probably the best supported.