TFS 2010: change work item types and retain existing source history

Question

We started programming in a project that uses Agile Work Item Templates. Now, there is some history of the code that we want to keep.

Also, we want to change to a customized CMMI template, so it is close to CMMI, but customized, with slightly different work items, also some new/removed ones (for testing purposes, we set it up in a different project).

How can we now merge the source (and history) from the one project with the work items from another project?

From my understanding, you could simply export/import the work item types, but then, all the reports and queries as well as the dashboard would not get updated properly as well? So all scenarios we can come up with now result in a loss of version history (simply importing the current state of the source into newly created project using CMMI and then updating the work items).

Is there a better solution?

(using TFS 2010 and VS 2010)

edit: some useful information to be found here: http://blogs.msdn.com/b/willy-peter_schaub/archive/2011/05/17/tfs-integration-tools-where-does-one-start-part-3-dust-has-settled-did-it-work.aspx - like me, you will probably especially run into trouble with the ProcessBuildTemplates

Answer 1

Have you considered using the TFS Integration Tools? I'm not sure about the successful migration of work items for Team Projects using different templates, but I've been able to successfully migrate code with its history between Team Projects.