New Post: Auto Increment ProductVersion & use a new ProductID in btdfproj file with TFS BUILD

HI ,
I am using TFS (2010) build to create btdf MSI. I need help to figure out this

-> With every TFS build, I want the ProductVersion to be incremented & automatically checked-in to btdfproj file.
-> A new Guid should be replaced in ProductId and checked-in by TFS to btdfproj file.

Any ideas how to achieve this ? Help truly appreciated.