I have just blogged about changing the default team build workflow to build Biztalk deployment framework (BTDF) msi using Team Build in TFS2010

http://wp.me/p1kcLh-56

I hope you will find it helpful

Thanks for posting this!

A couple of other related notes:
For Team Build 2005/2008, there's an easy way to stop the output folder redirection.  In the build project, set the property <CustomizableOutDir>true</CustomizableOutDir>.  That should prevent the relative paths from being broken during a Team Build build.  This might also work in Team Build 2010 when using the upgrade build process template.

I found a related post on changing this behavior in Team Build 2010 here.

Thanks,
Tom

Another more recent blog post on this topic.

Team Build is now fully supported in V5.0 (Final).  Documentation is located here.