I've done plenty of versioning in databases before and generally we used Extended properties to mark which DB was which. That probably won't work for you given that you want to run multiple versions of the software at one time. One other option (and not necessarily a better one) is to create multiple instances and have each version of the DB on a different instance.
Kenneth FisherI was once offered a wizards hat but it got in the way of my dunce cap.--------------------------------------------------------------------------------For better, quicker answers on T-SQL questions, click on the following... http://www.sqlservercentral.com/articles/Best+Practices/61537/[/url]For better answers on performance questions, click on the following... http://www.sqlservercentral.com/articles/SQLServerCentral/66909/[/url]Link to my Blog Post --> www.SQLStudies.com[/url]