Is the screen to keep the bees in the box? If you have access a frame of brood, The brood will keep them there. I guess I can't really answer Because I am not sure what the screen is for. Also if you hive them just before dark they will stay.
Use a queen excluder-put it between the bottom board and your hive remove it after a couple of days. This is the only use I've found for a 'excluder' making it a includer.
Drawn comb help if you have any, place it in the center postions.
I've found if after a day or two they are all over the comb and not balled up in one place, they are more than likely gonna stay.
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