Thread:Project:Support desk/Copyright notice problem

How do I configure MediaWiki to show more than one license at the bottom (for example, "Content is available under CC-BY-SA and GFDL")? And how do I create my own copyright notice (for example, "Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. See Terms of Use for details.") rather than the generic "Content is available under"...?