They are used just like any other wad except you first have to insert the one piece inside the other. Loading data for them does differ somewhat from other normal one piece wads. I bought some many years ago and tried them, didn't care for them and tossed the remainder in the trash. I'm not even sure if Lage is still in business. Finding the data for them will not be simple as they were never very popular, I'd trash them and buy some decent wads if it were me.