WSDL – Additional methods (API’s) .. How to get them in exis

We had one WSDL with 10 method calls or API’s. Now with new release we have added two method calls or API’s.

I already have existing project for this old WSDL. How do I get these extra calls in this old project? Or

If I create new project with new WSDL (with 12 API’s) then how to get old code for existing 10 API’s from old project.

Thanks for your help.