Know how!?

If you open Internet Explorer and select ---> View ---> Explorer Bars, you will see there all kind of Explorer Bars. Select History or Click CTRL + H. Well know I whana do someting like that on my own, but the problem is this: I whana users to be able to drag&drop links in some folders.How I can do that ? Will JavaScript or DHTML help me out?I allready made an IE plug in that it's accepting HTML files from the web