Vlad, they're made to take advantage of features in P5. It seems like there is enough demand for a P4 version, so I'll be working on that once I take care of a few things. You could use 'em but wouldn't be able to do much posing. France, if it's the drooping back you are refering to... I pulled it down a little because the poses that I was using in my test animations were cause the back to even up during the calculation of the dynamics. It is propably a little low, though.