Customizing TFS to fit your process can be a significant undertaking if you have an involved and detailed process.  Our tools can guidance for doing this could certainly use some work to help stream line it.  Kathryn Elliott, one of the people on our documentation team, is undertaking the task of understand how we can improve the experience for people.  She’ll be focusing primarily on documentation and guidance.  She’s started a blog series to solicit feedback on what you need most.  If you have opinions about this, go comment on her post here: http://blogs.msdn.com/kaelli/archive/2009/05/15/what-information-will-best-support-your-team-foundation-customization-requirements.aspx  

Brian