Stop the Sidebar Scroll

I actually want to stop the scroll of my sidebar on right side when it reaches to the last widget, but the content on the left side (i.e. the latest posts) should scroll. More Specifically, I want to implement the sidebar scroll functionality just like http://boingboing.net/

Scroll down in boing boing and you’ll see what I want.

I have been through web, and people suggest using the method given here :-
http://www.vertstudios.com/blog/jquery-sticky-scroller-position-fixed-plugin/

but am bit of a newbie, and dont know that how to implement it, to suite my needs.

Thanks for any suggestions, in advance.