Attached Link: http://www.renderosity.com/tut.ez?Form.ViewPages=632

If attaching to a figure means that you don't want certain areas to fall off a figure, you do that by editing the constrained group of the clothing. Usually the merchants who sell dynamic clothing, or put stuff out for free, have already set up a logical constrained group. I recommend reading not just one tutorial, but several. Each one usually has one or two things that none of the others do. It's better to understand how dynamic clothing works, rather than just following instructions. Jusletgo's is my favorite dynamic clothing tutorial, but I have also referred to PhilC's and Hmann's are good too (though, as far as I know, Hmann's is only available in the clothing packs he sells).