We have done a number of extractions from homes and sheds, and we just run a few rubber bands across the top and sides, crisscrossing them. It's easy then to tuck bits of brood comb under them and the bees just cut away the rubber bands once they have secured the comb to the frame.
I lost a few queen cages when I first started, dropped them right to the bottom of the hive, so I llearned to rubber band them in as a safety measure. Works really well.
