I have created a database model in Visio Professional (2003). I know that the Enterprise version has the ability to create a DB in SQL Server based on the data in Visio. I d
I have not done this, but here it goes.
For visio 2010 there is nice plugin Visio Forward Engineer:
http://forwardengineer.codeplex.com/
If you can somehow obtain the type library from the enterprise version you can use VBA to get out the definitions. Secondhand enterprise architect versions of VS 2002 and VS 2003 can be brought from ebay for a few hundred dollars.