compiling widgetset in netbeans

I am developing a chat module for a certain project.
I am going to use the refresher component which i found in vaadin addons.

The component require to be compiled first as a widgeset and also to add a line on the Widgeset.gwt.xml file


and also in the web.xml

I need to be able to use that component but am using Netbeans for which the project directories and the file contents are different from eclipse

Can anyone help please.
-To allocate the Widgeset.gwt.xml file in Netbeans
-To compile the widgetset and if there are commands too


Take a look at the
Using Add-ons in NetBeans