http://www.poseworks.com/serendipity/index.php?/archives/14-Rename-Node-Wacro.html

Says it works in poser 6, but it also works in poser 8. I don't know if this is the case in 9 and 2012. I was always under the impression that this script was included with poser 6 and can be accessed via Wacros; User Defined.

I've never seen any scripts that rename input parameter names... I'm sure that some python savvy individual will show up with a solution or answer, though.