TIBCO Business Studio - BPM Editionallows you to copy and reuse an old project.
Procedure
Clean the entire project
Copy, rename and refactor the project
Rename everything with the new project name
Ensure that the old references are removed int the rasc generation process
Deploy the project as usual
Note: The deployment will fail with a 500 generic server exception, if the project is not cleaned before it is copied. This is because the generated artefacts of first project get copied