How do you do it?

A short video clip rekindled an old memories on Doom2 at
http://geekvideo.blogspot.com/2007/03/doom-2-hell-on-earth.html ,
featuring on-camera shots of John Romero, American McGee, Shawn Green
and Jay Wilbur. :)

OK I've loading about 6 mods but they are all in a zipped folder in my
computer and i can't get them to appear in the mods menu. So i'm stuck with
them there just wasting space until someone will be nice enough to tell me
what i'm doing or did wrong.........and how to fix it, cause ...