SIP Header Rename

Is there a way to change the name of a SIP header other than creating a new header, copying header value to it and removing the original?

Example:

From:

    ININAttr: "header parameters and values"

To:

   User-to-User: "header parameters and values"

We've tried this but didn't work:

sip-manipulation

        name                                    replace

        description                            

        split-headers                          

        join-headers                           

        header-rule

                name                                    replaceinin

                header-name                             ININAttr

                action                                  manipulate

                comparison-type                         case-insensitive

                msg-type                                any

                methods                                 INVITE

                match-value                             ININAttr

                new-value                              

                element-rule

                        name                                    replaceininattr

                        parameter-name                          ININAttr

                        type                                    header-param-name

                        action                                  replace

                        match-val-type                          any

                        comparison-type                         pattern-rule

                        match-value                             ININAttr

                        new-value                               User-To-User

We also played with other value types and nothing works.

BR,

Mark