[galaxy-dev] How to add cuffmerge?

Hello, Our local installation of Galaxy doesn't have the 'cuffmerge' tool under "NGS:RNA RNA-Seq". It has 'cufflinks', 'cuffcompare', and 'cuffdiff', but no 'cuffmerge', which is essential for the workflow. Could anyone tell me how I could add "cuffmerge" to the list of tools? Thank you very much. Ken.