A ThinWire IDE with a WYSIWYG, a plugin for eclipse or NetBeans

I am trying to learn ThinWire; it looks like a great framework. I started following the tutorial "Creating and Debugging ThinWire Applications with Eclipse ..." at "http://tedchoward.wordpress.com/2006/08/23/creating-and-debugging-thinwire-applications-with-eclipse/"; I created a project with the Thinwire source code and everything was working fine, but I couldn't create the servlet as explained in the tutorial. What I really need is an IDE with a WYSIWYG, a plugin for eclipse or NetBeans. The plugin I found for Eclipse is a JAR file and I don't know how to use that.