i dont know but i kind of doubt it. ive never tried that though. if you wait til they are settled down for the night it may be easier. i know you have an awkward coop for that though. good luck with all that though.
in my experience ive found that if you repeatedly pick them up and put them on the roost they will learn in a few days to go on it by themselves. the first few times you put them on the roost they may jump right off. just keep at it. they will learn. worked for me.