You can convert that bra to dynamic using this tutoria. So far as the dynamics of it go, you would have it collide against the parts of the body IE: hands and fingers, that it will be coming into contact with.  Just as if you were draping a cloth over a box/table.

http://www.renderosity.com/mod/tutorial/index.php?tutorial_id=868

See this recent thread for some tips.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2712363

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi