(basically just compile, add a ref to your web project and add a TagMapping to the web config)
I'm sorry... I am VERY new at this, however, I do have a project going, and it works. I don't fully understand what you are saying here though. I want the web parts to work with AJAX, but it doesn't. It is behaving as it always has since I have made it.
Could you explain to me a little more exactly what you mean. Do I need to place your .dll in my bin directory in MY project? Again... I am not quite sure what you mean here.