Customize JTable in NetBeans GUI Builder

I want to:
1 Change the column title
2 Customize some cell's renderer

It seems I have to write a TableModel and Cell Renderer for it. But What I really want to do is just prototypeing the GUI to communicate with markting. I originally think NetBeans GUI Builder is a good tool to do this job.

Yes, I believe you can do that in NetBeans. Click on the JTable properties and then click on the Model.