Wow, 30+ views and no replies. This should be simple. I can do it in ProE quite easily.
Martin dont know if your still trying to do this or not, or if this will help but I create a dimension in an assembly/part attach a sensor to it, In your drawing you can use that Refernce Dim and it will update, I always put my Note in the Dimension or create a Note with that Dimension nested into it.
Hope this helped