hmmm... the arms and legs, you mean? grab the curve dial and yank it around. see if you see anything happening. i'm not sure how well it will work on such long pieces. also, if you expected the curve parameter on forearm and upper arm (say) to make the arm move/look like spaghetti.... you're asking a bit much. ;) also make sure each part has plenty of vertices for the curve parameter to work with. and... there's really no way to control which way the curve parameter curves things. i think it picks a certain axis, and decides which way is 'positive' curve and which way is negative curve.