Quote - Which version of Poser are you using?

It is possible to add extra controls to the skirt. It is then possible to add extra code to the skirt CR2 to allow one body part joint (or morph), to be remotely controlled by another. This is generally referred to as "ERC" control. It is very possible it is this that is being employed by those other artists.

The best explanation of how it works and how to set it up that I know of is at:-
http://www.nerd3d.com/modules.php?name=Content&pa=showpage&pid=8

Then as mentioned in other posts is the option to go the hybrid route. This is where the clothing is part conforming and part dynamic.

Suggest at this point you just put to one side your difficulty in understanding that with a leg containing a buttock that the thigh will not deform the hip. Then decide which of the above two methods you would like to pursue.

I, and I'm sure others, will be happy to help you.

The skirt on this model is a perfect example of what I am saying.

http://www.renderosity.com/mod/bcs/dirty-diana-character-outfit-/45745

This is done completely different than what you have been suggesting both here and your tutorials, and I honestly can't understand how it's done. Mytilus took the polygons of the entire skirt and made part of one single Hip group while keeping the Hips > Buttocks > Thighs bones hierarchy in place. And yet, the skirt perfectly follows thigh and buttock movements.

Now, the logical solution would be to the contact the author, whom I know and have talked to. But not even he understands what's wrong on my end.

In an experiment last night, I copied over the bone structure and groups from one of his skirt models and put it over mine, which I used in the screenshot in the initial post of this thread. Remarkably, it now works perfectly fine as intended. What has me befuddled is that when I tried to do it on my own, I was so certain that I performed the same operations, yet it did not work for me. It only works when I copy over his bone structure and groups.