http://www.renderosity.com/mod/bcs/cols-m4k4-mixer/98820/ Thank you for posting this and for the info on this wonderful tool! It is something that will be a huge help with projects that require youngsters! 

Cheers!

You're welcome.  It's a great tool that allows one to use their existing runtime to get whatever they are looking for.  Not just for M4/K4, but any set of adult/child figures.  One only has to change the name of the "child" in the scene to "The Kids 4" for it to work on any figures.  The child must be named The Kids 4 but that's one click on the parameters menu.  And you can change the name back to whatever you wish once the morph has been created if you wish.