tks for your advise englishbob, i really appreciate it.
at first, i thought bertha's skirt is just bending too ( after watching philc tut creating an extra bone
as a bodyhandle for the bending ), but i just couldn't find the extra bone in bertha bones setup...
is there one in it ?

you are right that i agreed this is not the best solution for me, its just not natural.

ok, my aim is mainly  to create  and model of my own character, (not by using existing cloth or prop ) require simple animation like walking, running, jumping. skirt will not poke the feet...etc !
don't need to be too complex, draping, dynamic is not too important.
it could be realism or toony. example i've model and rigged a woman wearing a long skirt, its in one whole piece, i do not want to create the skirt as a seperate object and import as 'prop'.
so, in this case, what'd be the best method to clothify it ?

i'll go read your tut after this post.

tks a lot for attending my qestions !!!!