Many people have asked on How-To enable TFS 2010 style feature on the upgraded projects. Please visit following articles from Lakhminder which explains the process

TFS 2010: Enable Test Case Management for upgraded Team Projects

http://blogs.msdn.com/b/lakhminder/archive/2010/09/30/tfs-2010-enable-test-case-management-for-upgraded-team-projects.aspx

Create TFS 2010 Reports for upgraded Team projects.

http://blogs.msdn.com/b/lakhminder/archive/2010/09/30/create-tfs-2010-reports-for-upgraded-team-projects.aspx

Enable TFS 2010 Style dashboard and Excel Reports on MSF Agile 4.2 or MSF CMMI 4.2 site collections

http://blogs.msdn.com/b/lakhminder/archive/2010/09/30/enable-tfs-2010-style-dashboard-and-excel-reports-on-msf-agile-4-2-or-msf-cmmi-4-2-site-collections.aspx

Author: Lakhminder Singh