I'm trying to make a WearMC model for my friend and I, and the exporting to a WearMC file will not work. I've gone online and tried to look for a solution, and all I can find is what it says on WearMC's "Modeling instructions" page, that I need to make a so-called "Parent cube"?

What is a parent cube? What does it do? How do I make one? How do I use it?

I'm completely clueless. I just started this modeling stuff and I'm a huge noob with it. Someone please help.. ;_;