Clone a small open-source application (attached) based on supplied Cocoa code.

Please install the attached application on Mac OS X 10.4 (will run on 10.5 but not so stable). The source code is also provided. The application is obsolete now and the developer is no longer in business. We want to base ours on this application and include all its features but also make it stable in OS X 10.5. We believe cocoa is the best for this but are open to other suggestions. Please PM with questions.