Have now implemented a .NET DLL provided by someone else in the office doing some work porting things from other project/bug management systems into TFS.
Using this I can now append to any task ID I like. In any field within the task. And can append or overwrite. I get a return code back indicating success or failure. All via parameters provided to my code during the run. And without having to create any cumbersome manual connection templates.
So I can update TFS properly. On the fly. During a run. Easily.
Result.
