quote: *i defer to masters such as trav, svdl and others in this matter.  but i'm betting it has something to do with being a dynamic, soft-decorated, hard-decorated, or choreographed group.

*It isn't really that hard but you have to be a little acquainted with the group-editor: Suppose you have a skirt with stitched-up pockets, a belt and buckle and some buttons on it and you want to lift up a tip of the skirt:
the skirt itself is part that moves, this is the dynamic group.
You don't want to drop the skirt, so a part  of the skirt is attached to the body, this is the constraint group.
The belt and the pockets move and folding with the shape of the skirt: this is the soft-decorated group.
The bucket and the buttons move with the skirt, but keep their own shape: this is the hard-decorated group.
And at last when you want to pull or raise a tip of the skirt, you select that part of the skirt where you grip it, and then you go to the pose room and you move the whole skirt in the last simulation-frame in the direction you want. In the simulation only the part you selected will move that way: this the choreographed group.

Hope this clear-up things, I spent the last five days in the cloth-room and I learned a lot of new things.

-How can you improve things when you don't make mistakes?