How do i do this?

On page 34 of 5.0 mustang and super fords(feb issue) theres a stang with out the side panels things on the bottom(?). I think it looks hundreds better with out the step bars you often see on trucks :D . Its hard to explain but if you have the mag you will know what im talking about. Has anyone else done this? Post pics if you can.
 
I am looking at the saleen skirts..... its not really noticeable at first... but I think it really lines up with the cobra bumper i have. I dunno what it looks liek with a stock rear bumper though :(