Thanks to Alois Kraus. Great content on reading and writing config files using .NET 2.0
Read/Write App.config with .NET 2.0/Enterprise Library
http://geekswithblogs.net/akraus1/articles/64871.aspx
Here’s a good one from Tom Hollander’s blog.
External configuration files in Enterprise Library for .NET Framework 2.0
http://blogs.msdn.com/tomholl/archive/2006/04/02/entlib2externalconfig.aspx