I just checked, the weight-mapped rigging is under the Creative Commons license, as well. So if that suits your purpose better, you'd be able to use it as a basis and still distribute your work freely.

Honestly, if I had a lot more time and motivation, I'd probably either try to come up with my own weight-mapped rigging or, more likely, try to tweak the existing one. Knowing Diogenes, he probably had good reasons for putting the centres where they are, so that could be an interesting learning experience. Maybe one day...

-- I'm not mad at you, just Westphalian.