Adding multiple WSDLs with same interface name

I am getting the same error posted by the last person (''target project already contains interface for binding") when trying to clone an interface from one project to another when the binding name exists in the target project, but it has a different endpoint. What have people been doing to resolve this? I really don't want to have to create another environment, for maintainability reasons. My soapUI version = pro 4.5.1