Notes, Tips and Tricks on Developing in Dynamics GP
http://blogs.msdn.com/developingfordynamicsgp/archive/tags/Support+Debugging+Tool/default.aspx
I've used David Musgrave's Support Debugging Tool several times, it's just been updated. You'll want to look at this...
About Steve Gray
Steve is a seasoned (translate: old) developer in VB and ASP.NET. He spends most of his time in Dynamics GP, writing custom mods for consulting firms. Crystal reports, eConnect, VS Tools for Dynamics... anything that comes along.