First, guiTwo must not suffer from any of the problems detailed in the Project 5 Feedback. (In particular, it must not suffer from the "inefficient screen real estate management" problem.) For most of you, this means a substantial (if not total) redesign of your interface.
Big Hint: rather than blindly hack code, which will take an enormous amount of time and which may not result in success for many of you, I suggest that you begin by doing some research on GUI design using Java. Before beginning the design of this program, take five or ten hours to read authoritative references on Java GUI design. A few online resources to get you started are:
However, don't rely on these alone. In addition, I also strongly suggest that you visit your local big-box bookstore (Border's, Barnes and Noble), and spend some time looking through their Java reference section. An hour or two there, even you ultimately decide not to buy any of the books, will probably make a tremendous difference in the quality of your GUI.