i just put my skirts on my car at work, i used a small screw and screwed the top rear of the skirt to the rear bumber, the front of the skirts are easy just drill use thoes lil U clip thingies, cant remember what there called, but the clip on a flat pice of metal and it acts like a hole for a screw, but when i mold my skirt to the bumper im gunna take the screw out and glue it.
as for the rocker pannel skirts i used 1 screw on the front and then one on the back, then under the car i drilled into the bottom of the car and inserted a plastic tab that goes in but doesnt come out lol, sry i dont know the name of these things but thats how i got mine on and they look kick ass!
good luck