I put the spring back from the contact frame down on a flat surface, put my coated paper on top, then line up the negatives, place the glass on top, and then put the sandwich inside the wood frame of the printing frame, and close the springs. I also try to mark the negative positions on my paper with very light pencil marks, which makes it easier to line them up when preparing to print. This works fine for alt-process printing, where you are dealing with hand-coated emulsions you can work on in room light. Probably wouldn't work if you are doing silver-gelatin printing.